                         SEQUENCE LISTING

<110>  Ab Studio Inc.
 
<120>  MULTISPECIFIC ANTIBODIES AND USES THEREOF

<130>  44836-0013WO1

<140>  PCT/US2021/057916
<141>  2021-11-03

<150>  63/109,317
<151>  2020-11-03

<160>  126   

<170>  PatentIn version 3.5

<210>  1
<211>  10
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of BCMA VHH

<400>  1

Gly Arg Leu Phe Arg Tyr Thr Asp Met Ala 
1               5                   10  


<210>  2
<211>  16
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of BCMA VHH

<400>  2

Phe Ser Tyr Val Ser Gly Arg Thr Asn Tyr Ala Asp Ser Val Lys Gly 
1               5                   10                  15      


<210>  3
<211>  18
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of BCMA VHH

<400>  3

Ala Gln Gly Arg Ser Pro Tyr Arg Trp Gly Ser Tyr Ser Ser Met Phe 
1               5                   10                  15      


Gly Ser 
        


<210>  4
<211>  10
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of BCMA VHH

<400>  4

Gly Arg Thr Phe Ser Ser Ala Phe Met Gly 
1               5                   10  


<210>  5
<211>  17
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of BCMA VHH

<400>  5

Gly Ile Arg Trp Gly Ala Gly Asn Thr Tyr Tyr Ala Asp Ser Val Lys 
1               5                   10                  15      


Gly 
    


<210>  6
<211>  12
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of BCMA VHH

<400>  6

Ala Arg Trp Arg Trp Gly Pro Lys Tyr Tyr Asp Tyr 
1               5                   10          


<210>  7
<211>  10
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of BCMA VHH

<400>  7

Gly Arg Thr Phe Gly Trp Tyr Thr Met Gly 
1               5                   10  


<210>  8
<211>  17
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of BCMA VHH

<400>  8

Ala Ile Ser Pro Ser Gly Gly Ala Thr Tyr Tyr Ala Asp Ser Val Lys 
1               5                   10                  15      


Gly 
    


<210>  9
<211>  12
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of BCMA VHH

<400>  9

Asn Ala Arg Leu Trp Gly Leu Gly Ile Arg Asn Tyr 
1               5                   10          


<210>  10
<211>  10
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of BCMA VHH

<400>  10

Gly Arg Ser Phe Ser Arg Tyr Ala Met Gly 
1               5                   10  


<210>  11
<211>  16
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of BCMA VHH

<400>  11

Ser Ile Thr Arg Phe Gly Ser Thr Asn Tyr Ala Asp Ser Met Lys Gly 
1               5                   10                  15      


<210>  12
<211>  20
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of BCMA VHH

<400>  12

Ala Lys Glu Arg Trp Tyr Gly Ser Arg Trp His Val Ala Asn Tyr Leu 
1               5                   10                  15      


Gln Tyr Asp Ser 
            20  


<210>  13
<211>  9
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of CD38 VHH

<400>  13

Gly Thr Val Gly Pro Thr Val Met Gly 
1               5                   


<210>  14
<211>  17
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of CD38 VHH

<400>  14

Leu Ile Gly Trp Thr Gly Gly Val Thr Ala Tyr Ala Asp Ser Val Lys 
1               5                   10                  15      


Asp 
    


<210>  15
<211>  17
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of CD38 VHH

<400>  15

Ala Ala Asp Ser Asn Arg Arg Arg Tyr Tyr Gly Pro Tyr Glu Tyr Asp 
1               5                   10                  15      


Ser 
    


<210>  16
<211>  13
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of CD3 VHH

<400>  16

Lys Ala Ser Gly Tyr Thr Phe Thr Ser Tyr Thr Met His 
1               5                   10              


<210>  17
<211>  17
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of CD3 VHH

<400>  17

Tyr Ile Asn Pro Ser Ser Gly Tyr Thr Lys Tyr Asn Gln Lys Phe Lys 
1               5                   10                  15      


Asp 
    


<210>  18
<211>  12
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of CD3 VHH

<400>  18

Ala Arg Trp Gln Asp Tyr Asp Val Tyr Phe Asp Tyr 
1               5                   10          


<210>  19
<211>  13
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of CD3 VHH

<400>  19

Lys Ala Ser Gly Tyr Thr Phe Thr Arg Tyr Thr Met His 
1               5                   10              


<210>  20
<211>  17
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of CD3 VHH

<400>  20

Tyr Ile Asn Pro Ser Arg Gly Tyr Thr Asn Tyr Asn Gln Lys Phe Lys 
1               5                   10                  15      


Asp 
    


<210>  21
<211>  12
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of CD3 VHH

<400>  21

Ala Arg Tyr Tyr Asp Asp His Tyr Cys Leu Asp Tyr 
1               5                   10          


<210>  22
<211>  13
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of CD3 VHH

<400>  22

Lys Ala Ser Gly Tyr Thr Phe Thr Arg Tyr Thr Met His 
1               5                   10              


<210>  23
<211>  17
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of CD3 VHH

<400>  23

Tyr Ile Asn Pro Ser Arg Gly Tyr Thr Asn Tyr Asn Gln Lys Phe Lys 
1               5                   10                  15      


Asp 
    


<210>  24
<211>  12
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of CD3 VHH

<400>  24

Ala Arg Tyr Tyr Asp Asp His Tyr Cys Leu Asp Tyr 
1               5                   10          


<210>  25
<211>  10
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of CD3 VH

<400>  25

Gly Tyr Thr Phe Thr Ser Tyr Thr Met His 
1               5                   10  


<210>  26
<211>  17
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of CD3 VH

<400>  26

Tyr Ile Asn Pro Ser Ser Gly Tyr Thr Lys Tyr Asn Gln Lys Phe Lys 
1               5                   10                  15      


Asp 
    


<210>  27
<211>  12
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of CD3 VH

<400>  27

Ala Arg Trp Gln Asp Tyr Asp Val Tyr Phe Asp Tyr 
1               5                   10          


<210>  28
<211>  10
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of CD3 VL

<400>  28

Arg Ala Ser Ser Ser Val Ser Tyr Met His 
1               5                   10  


<210>  29
<211>  7
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of CD3 VL

<400>  29

Asp Thr Ser Asn Leu Ala Ser 
1               5           


<210>  30
<211>  9
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of CD3 VL

<400>  30

Gln Gln Trp Ser Ser Asn Pro Pro Thr 
1               5                   


<210>  31
<211>  10
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of CD3 VL

<400>  31

Arg Ala Ser Ser Ser Val Ser Tyr Met His 
1               5                   10  


<210>  32
<211>  7
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of CD3 VL

<400>  32

Ala Ala Ser Asn Arg Ala Ser 
1               5           


<210>  33
<211>  9
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of CD3 VL

<400>  33

Gln Gln Trp Ser Ser Asn Pro Pro Thr 
1               5                   


<210>  34
<211>  10
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of CD3 VL

<400>  34

Arg Ala Ser Ser Ser Val Ser Tyr Met His 
1               5                   10  


<210>  35
<211>  7
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of CD3 VL

<400>  35

Ala Thr Ser Asn Arg Ala Ser 
1               5           


<210>  36
<211>  9
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of CD3 VL

<400>  36

Gln Gln Trp Ser Ser Asn Pro Pro Thr 
1               5                   


<210>  37
<211>  10
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of CD3 VL

<400>  37

Arg Ala Ser Gln Ser Val Ser Tyr Met His 
1               5                   10  


<210>  38
<211>  7
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of CD3 VL

<400>  38

Ala Thr Ser Asn Arg Ala Ser 
1               5           


<210>  39
<211>  9
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of CD3 VL

<400>  39

Gln Gln Arg Ser Ser Asn Pro Pro Thr 
1               5                   


<210>  40
<211>  10
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of CD3 VL

<400>  40

Arg Ala Ser Ser Ser Val Ser Tyr Met His 
1               5                   10  


<210>  41
<211>  7
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of CD3 VL

<400>  41

Asp Thr Ser Asn Leu Ala Ser 
1               5           


<210>  42
<211>  9
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of CD3 VL

<400>  42

Gln Gln Arg Ser Ser Asn Pro Leu Thr 
1               5                   


<210>  43
<211>  10
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of CD3 VL

<400>  43

Arg Ala Ser Gln Ser Val Ser Tyr Met His 
1               5                   10  


<210>  44
<211>  7
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of CD3 VL

<400>  44

Asp Ala Ser Asn Arg Ala Ser 
1               5           


<210>  45
<211>  9
<212>  PRT
<213>  Artificial

<220>
<223>  CDR sequence of CD3 VL

<400>  45

Gln Gln Trp Ser Ser Trp Pro Pro Thr 
1               5                   


<210>  46
<211>  124
<212>  PRT
<213>  Artificial

<220>
<223>  BCMA VHH sequence

<400>  46

Gln Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Ala Gly Gly 
1               5                   10                  15      


Ser Leu Arg Leu Ser Cys Ala Ser Ser Gly Arg Leu Phe Arg Tyr Thr 
            20                  25                  30          


Asp Met Ala Trp Tyr Arg Gln Ala Pro Gly Lys Gln Arg Glu Leu Val 
        35                  40                  45              


Ala Phe Ser Tyr Val Ser Gly Arg Thr Asn Tyr Ala Asp Ser Val Lys 
    50                  55                  60                  


Gly Arg Phe Thr Ile Ser Arg Asp Asn Val Lys Lys Val Val Tyr Leu 
65                  70                  75                  80  


Gln Met Ser Ser Leu Thr Pro Glu Asp Thr Ala Val Tyr Tyr Cys Ala 
                85                  90                  95      


Gln Gly Arg Ser Pro Tyr Arg Trp Gly Ser Tyr Ser Ser Met Phe Gly 
            100                 105                 110         


Ser Trp Gly Gln Gly Thr Leu Val Thr Val Ser Ser 
        115                 120                 


<210>  47
<211>  119
<212>  PRT
<213>  Artificial

<220>
<223>  BCMA VHH sequence

<400>  47

Gln Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Ala Gly Gly 
1               5                   10                  15      


Ser Leu Arg Leu Ser Cys Ala Ala Ser Gly Arg Thr Phe Ser Ser Ala 
            20                  25                  30          


Phe Met Gly Trp Phe Arg Gln Ala Pro Gly Lys Glu Arg Asp Phe Val 
        35                  40                  45              


Ala Gly Ile Arg Trp Gly Ala Gly Asn Thr Tyr Tyr Ala Asp Ser Val 
    50                  55                  60                  


Lys Gly Arg Phe Thr Ile Ser Arg Asp Asn Ala Lys Asn Met Val Tyr 
65                  70                  75                  80  


Leu Gln Met Asn Ser Leu Glu Pro Glu Asp Thr Ala Val Tyr Tyr Cys 
                85                  90                  95      


Ala Arg Trp Arg Trp Gly Pro Lys Tyr Tyr Asp Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Leu Val Thr Val Ser Ser 
        115                 


<210>  48
<211>  119
<212>  PRT
<213>  Artificial

<220>
<223>  BCMA VHH sequence

<400>  48

Gln Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Ala Gly Gly 
1               5                   10                  15      


Ser Leu Arg Leu Ser Cys Thr Ala Ser Gly Arg Thr Phe Gly Trp Tyr 
            20                  25                  30          


Thr Met Gly Trp Phe Arg Gln Gly Pro Gly Lys Glu Arg Glu Phe Val 
        35                  40                  45              


Ala Ala Ile Ser Pro Ser Gly Gly Ala Thr Tyr Tyr Ala Asp Ser Val 
    50                  55                  60                  


Lys Gly Arg Phe Thr Ile Ser Arg Asp Tyr Ala Lys Asn Ala Val Tyr 
65                  70                  75                  80  


Leu Gln Met Asn Ser Leu Lys Pro Glu Asp Thr Ala Val Tyr Tyr Cys 
                85                  90                  95      


Asn Ala Arg Leu Trp Gly Leu Gly Ile Arg Asn Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Leu Val Thr Val Ser Ser 
        115                 


<210>  49
<211>  126
<212>  PRT
<213>  Artificial

<220>
<223>  BCMA VHH sequence

<400>  49

Gln Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Val Gly Gly 
1               5                   10                  15      


Ser Leu Arg Leu Ser Cys Ala Ala Ser Gly Arg Ser Phe Ser Arg Tyr 
            20                  25                  30          


Ala Met Gly Trp Phe Arg Gln Ala Pro Gly Lys Glu Arg Glu Leu Val 
        35                  40                  45              


Ala Ser Ile Thr Arg Phe Gly Ser Thr Asn Tyr Ala Asp Ser Met Lys 
    50                  55                  60                  


Gly Arg Phe Thr Val Ser Arg Asp Asn Ser Lys Asn Thr Leu Tyr Leu 
65                  70                  75                  80  


His Met Asn Asn Leu Lys Pro Asp Asp Thr Ala Val Tyr Tyr Cys Ala 
                85                  90                  95      


Lys Glu Arg Trp Tyr Gly Ser Arg Trp His Val Ala Asn Tyr Leu Gln 
            100                 105                 110         


Tyr Asp Ser Trp Gly Gln Gly Thr Leu Val Thr Val Ser Ser 
        115                 120                 125     


<210>  50
<211>  123
<212>  PRT
<213>  Artificial

<220>
<223>  CD38 VHH sequence

<400>  50

Glu Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Ala Gly Gly 
1               5                   10                  15      


Ser Leu Arg Leu Ser Cys Ala Val Ser Gly Thr Val Gly Pro Thr Val 
            20                  25                  30          


Met Gly Trp Phe Arg Gln Ala Pro Gly Lys Lys Arg Glu Phe Val Ala 
        35                  40                  45              


Leu Ile Gly Trp Thr Gly Gly Val Thr Ala Tyr Ala Asp Ser Val Lys 
    50                  55                  60                  


Asp Arg Phe Thr Ile Ser Arg Asp Cys Ala Glu Asn Arg Val Asp Leu 
65                  70                  75                  80  


Gln Met Asp Ser Leu Lys Pro Glu Asp Thr Ala Val Tyr Tyr Cys Ala 
                85                  90                  95      


Ala Asp Ser Asn Arg Arg Arg Tyr Tyr Gly Pro Tyr Glu Tyr Asp Ser 
            100                 105                 110         


Trp Gly Gln Gly Thr Leu Val Thr Val Ser Ser 
        115                 120             


<210>  51
<211>  119
<212>  PRT
<213>  Artificial

<220>
<223>  CD3 VHH sequence

<400>  51

Gln Val Gln Leu Val Gln Ser Gly Ala Glu Val Lys Lys Pro Gly Ala 
1               5                   10                  15      


Ser Val Lys Met Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Ser Tyr 
            20                  25                  30          


Thr Met His Trp Val Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile 
        35                  40                  45              


Ser Tyr Ile Asn Pro Ser Ser Gly Tyr Thr Lys Tyr Asn Gln Lys Phe 
    50                  55                  60                  


Lys Asp Arg Ala Thr Leu Thr Ala Asp Lys Ser Thr Ser Thr Ala Tyr 
65                  70                  75                  80  


Met Glu Leu Ser Ser Leu Arg Ser Glu Asp Thr Ala Val Tyr Tyr Cys 
                85                  90                  95      


Ala Arg Trp Gln Asp Tyr Asp Val Tyr Phe Asp Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Leu Val Thr Val Ser Ser 
        115                 


<210>  52
<211>  119
<212>  PRT
<213>  Artificial

<220>
<223>  CD3 VHH sequence

<400>  52

Gln Val Gln Leu Val Gln Ser Gly Ala Glu Val Lys Lys Pro Gly Ala 
1               5                   10                  15      


Ser Val Lys Met Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Arg Tyr 
            20                  25                  30          


Thr Met His Trp Val Lys Gln Ala Pro Gly Lys Gly Leu Glu Trp Ile 
        35                  40                  45              


Ser Tyr Ile Asn Pro Ser Arg Gly Tyr Thr Asn Tyr Asn Gln Lys Phe 
    50                  55                  60                  


Lys Asp Arg Ala Thr Leu Thr Thr Asp Lys Ser Thr Ser Thr Ala Tyr 
65                  70                  75                  80  


Met Glu Leu Ser Ser Leu Arg Ser Glu Asp Thr Ala Val Tyr Tyr Cys 
                85                  90                  95      


Ala Arg Tyr Tyr Asp Asp His Tyr Cys Leu Asp Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Leu Val Thr Val Ser Ser 
        115                 


<210>  53
<211>  119
<212>  PRT
<213>  Artificial

<220>
<223>  CD3 VHH sequence

<400>  53

Gln Val Gln Leu Val Gln Ser Gly Ala Glu Val Lys Lys Pro Gly Ala 
1               5                   10                  15      


Ser Val Lys Met Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Arg Tyr 
            20                  25                  30          


Thr Met His Trp Val Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile 
        35                  40                  45              


Gly Tyr Ile Asn Pro Ser Arg Gly Tyr Thr Asn Tyr Asn Gln Lys Phe 
    50                  55                  60                  


Lys Asp Arg Ala Thr Leu Thr Thr Asp Lys Ser Thr Ser Thr Ala Tyr 
65                  70                  75                  80  


Met Glu Leu Ser Ser Leu Arg Ser Glu Asp Thr Ala Val Tyr Tyr Cys 
                85                  90                  95      


Ala Arg Tyr Tyr Asp Asp His Tyr Cys Leu Asp Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Leu Val Thr Val Ser Ser 
        115                 


<210>  54
<211>  119
<212>  PRT
<213>  Artificial

<220>
<223>  CD3 VH sequence

<400>  54

Gln Val Gln Leu Gln Gln Ser Gly Ala Glu Leu Ala Arg Pro Gly Ala 
1               5                   10                  15      


Ser Val Lys Met Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Ser Tyr 
            20                  25                  30          


Thr Met His Trp Val Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile 
        35                  40                  45              


Gly Tyr Ile Asn Pro Ser Ser Gly Tyr Thr Lys Tyr Asn Gln Lys Phe 
    50                  55                  60                  


Lys Asp Lys Ala Thr Leu Thr Ala Asp Lys Ser Ser Ser Thr Ala Tyr 
65                  70                  75                  80  


Met Gln Leu Ser Ser Leu Thr Ser Glu Asp Ser Ala Val Tyr Tyr Cys 
                85                  90                  95      


Ala Arg Trp Gln Asp Tyr Asp Val Tyr Phe Asp Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Thr Leu Thr Val Ser Ser 
        115                 


<210>  55
<211>  106
<212>  PRT
<213>  Artificial

<220>
<223>  CD3 VL sequence

<400>  55

Gln Ile Val Leu Ser Gln Ser Pro Ala Ile Leu Ser Ala Ser Pro Gly 
1               5                   10                  15      


Glu Lys Val Thr Met Thr Cys Arg Ala Ser Ser Ser Val Ser Tyr Met 
            20                  25                  30          


His Trp Tyr Gln Gln Lys Pro Gly Ser Ser Pro Lys Pro Trp Ile Tyr 
        35                  40                  45              


Asp Thr Ser Asn Leu Ala Ser Gly Val Pro Ala Arg Phe Ser Gly Ser 
    50                  55                  60                  


Gly Ser Gly Thr Ser Tyr Ser Leu Thr Ile Ser Arg Val Glu Ala Glu 
65                  70                  75                  80  


Asp Ala Ala Thr Tyr Tyr Cys Gln Gln Trp Ser Ser Asn Pro Pro Thr 
                85                  90                  95      


Phe Gly Gly Gly Thr Lys Leu Glu Thr Lys 
            100                 105     


<210>  56
<211>  106
<212>  PRT
<213>  Artificial

<220>
<223>  CD3 VL sequence

<400>  56

Gln Ile Val Leu Ser Gln Ser Pro Ala Ile Leu Ser Ala Ser Pro Gly 
1               5                   10                  15      


Glu Lys Val Thr Met Thr Cys Arg Ala Ser Ser Ser Val Ser Tyr Met 
            20                  25                  30          


His Trp Tyr Gln Gln Lys Pro Gly Ser Ser Pro Lys Pro Trp Ile Tyr 
        35                  40                  45              


Ala Ala Ser Asn Arg Ala Ser Gly Val Pro Ala Arg Phe Ser Gly Ser 
    50                  55                  60                  


Gly Ser Gly Thr Ser Tyr Ser Leu Thr Ile Ser Arg Val Glu Ala Glu 
65                  70                  75                  80  


Asp Ala Ala Thr Tyr Tyr Cys Gln Gln Trp Ser Ser Asn Pro Pro Thr 
                85                  90                  95      


Phe Gly Gly Gly Thr Lys Leu Glu Thr Lys 
            100                 105     


<210>  57
<211>  106
<212>  PRT
<213>  Artificial

<220>
<223>  CD3 VL sequence

<400>  57

Gln Ile Val Leu Ser Gln Ser Pro Ala Ile Leu Ser Ala Ser Pro Gly 
1               5                   10                  15      


Glu Lys Val Thr Met Thr Cys Arg Ala Ser Ser Ser Val Ser Tyr Met 
            20                  25                  30          


His Trp Tyr Gln Gln Lys Pro Gly Ser Ser Pro Lys Pro Trp Ile Tyr 
        35                  40                  45              


Ala Thr Ser Asn Arg Ala Ser Gly Val Pro Ala Arg Phe Ser Gly Ser 
    50                  55                  60                  


Gly Ser Gly Thr Ser Tyr Ser Leu Thr Ile Ser Arg Val Glu Ala Glu 
65                  70                  75                  80  


Asp Ala Ala Thr Tyr Tyr Cys Gln Gln Trp Ser Ser Asn Pro Pro Thr 
                85                  90                  95      


Phe Gly Gly Gly Thr Lys Leu Glu Thr Lys 
            100                 105     


<210>  58
<211>  106
<212>  PRT
<213>  Artificial

<220>
<223>  CD3 VL sequence

<400>  58

Gln Ile Val Leu Ser Gln Ser Pro Ala Ile Leu Ser Ala Ser Pro Gly 
1               5                   10                  15      


Glu Lys Val Thr Met Thr Cys Arg Ala Ser Gln Ser Val Ser Tyr Met 
            20                  25                  30          


His Trp Tyr Gln Gln Lys Pro Gly Ser Ser Pro Lys Pro Trp Ile Tyr 
        35                  40                  45              


Ala Thr Ser Asn Arg Ala Ser Gly Val Pro Ala Arg Phe Ser Gly Ser 
    50                  55                  60                  


Gly Ser Gly Thr Ser Tyr Ser Leu Thr Ile Ser Arg Val Glu Ala Glu 
65                  70                  75                  80  


Asp Ala Ala Thr Tyr Tyr Cys Gln Gln Arg Ser Ser Asn Pro Pro Thr 
                85                  90                  95      


Phe Gly Gly Gly Thr Lys Leu Glu Thr Lys 
            100                 105     


<210>  59
<211>  106
<212>  PRT
<213>  Artificial

<220>
<223>  CD3 VL sequence

<400>  59

Gln Ile Val Leu Ser Gln Ser Pro Ala Ile Leu Ser Ala Ser Pro Gly 
1               5                   10                  15      


Glu Lys Val Thr Met Thr Cys Arg Ala Ser Ser Ser Val Ser Tyr Met 
            20                  25                  30          


His Trp Tyr Gln Gln Lys Pro Gly Ser Ser Pro Lys Pro Trp Ile Tyr 
        35                  40                  45              


Asp Thr Ser Asn Leu Ala Ser Gly Val Pro Ala Arg Phe Ser Gly Ser 
    50                  55                  60                  


Gly Ser Gly Thr Ser Tyr Ser Leu Thr Ile Ser Arg Val Glu Ala Glu 
65                  70                  75                  80  


Asp Ala Ala Thr Tyr Tyr Cys Gln Gln Arg Ser Ser Asn Pro Leu Thr 
                85                  90                  95      


Phe Gly Gly Gly Thr Lys Leu Glu Thr Lys 
            100                 105     


<210>  60
<211>  106
<212>  PRT
<213>  Artificial

<220>
<223>  CD3 VL sequence

<400>  60

Gln Ile Val Leu Ser Gln Ser Pro Ala Ile Leu Ser Ala Ser Pro Gly 
1               5                   10                  15      


Glu Lys Val Thr Met Thr Cys Arg Ala Ser Gln Ser Val Ser Tyr Met 
            20                  25                  30          


His Trp Tyr Gln Gln Lys Pro Gly Ser Ser Pro Lys Pro Trp Ile Tyr 
        35                  40                  45              


Asp Ala Ser Asn Arg Ala Ser Gly Val Pro Ala Arg Phe Ser Gly Ser 
    50                  55                  60                  


Gly Ser Gly Thr Ser Tyr Ser Leu Thr Ile Ser Arg Val Glu Ala Glu 
65                  70                  75                  80  


Asp Ala Ala Thr Tyr Tyr Cys Gln Gln Trp Ser Ser Trp Pro Pro Thr 
                85                  90                  95      


Phe Gly Gly Gly Thr Lys Leu Glu Thr Lys 
            100                 105     


<210>  61
<211>  15
<212>  PRT
<213>  Artificial

<220>
<223>  Fc hinge sequence

<400>  61

Glu Pro Lys Ser Cys Asp Lys Thr His Thr Cys Pro Pro Cys Pro 
1               5                   10                  15  


<210>  62
<211>  15
<212>  PRT
<213>  Artificial

<220>
<223>  Fc hinge sequence

<400>  62

Gly Gly Gly Gly Ser Asp Lys Thr His Thr Cys Pro Pro Cys Pro 
1               5                   10                  15  


<210>  63
<211>  15
<212>  PRT
<213>  Artificial

<220>
<223>  Fc hinge sequence

<400>  63

Glu Pro Lys Ser Ser Asp Lys Thr His Thr Cys Pro Pro Cys Pro 
1               5                   10                  15  


<210>  64
<211>  10
<212>  PRT
<213>  Artificial

<220>
<223>  Fc hinge sequence

<400>  64

Asp Lys Thr His Thr Cys Pro Pro Cys Pro 
1               5                   10  


<210>  65
<211>  16
<212>  PRT
<213>  Artificial

<220>
<223>  Fc hinge sequence

<400>  65

Ser Thr Met Val Arg Ser Asp Lys Thr His Thr Cys Pro Pro Cys Pro 
1               5                   10                  15      


<210>  66
<211>  217
<212>  PRT
<213>  Artificial

<220>
<223>  Fc region sequence with knob mutations

<400>  66

Ala Pro Glu Leu Leu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro Lys 
1               5                   10                  15      


Pro Lys Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys Val 
            20                  25                  30          


Val Val Asp Val Ser His Glu Asp Pro Glu Val Lys Phe Asn Trp Tyr 
        35                  40                  45              


Val Asp Gly Val Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu Glu 
    50                  55                  60                  


Gln Tyr Asn Ser Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu His 
65                  70                  75                  80  


Gln Asp Trp Leu Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys 
                85                  90                  95      


Ala Leu Pro Ala Pro Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln 
            100                 105                 110         


Pro Arg Glu Pro Gln Val Tyr Thr Leu Pro Pro Tyr Arg Glu Glu Met 
        115                 120                 125             


Thr Lys Asn Gln Val Ser Leu Tyr Cys Leu Val Lys Gly Phe Tyr Pro 
    130                 135                 140                 


Ser Asp Ile Ala Val Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn 
145                 150                 155                 160 


Tyr Lys Thr Thr Pro Pro Val Leu Asp Ser Asp Gly Ser Phe Phe Leu 
                165                 170                 175     


Tyr Ser Lys Leu Thr Val Asp Lys Ser Arg Trp Gln Gln Gly Asn Val 
            180                 185                 190         


Phe Ser Cys Ser Val Met His Glu Ala Leu His Asn His Tyr Thr Gln 
        195                 200                 205             


Lys Ser Leu Ser Leu Ser Pro Gly Lys 
    210                 215         


<210>  67
<211>  217
<212>  PRT
<213>  Artificial

<220>
<223>  Fc region sequence hole mutations

<400>  67

Ala Pro Glu Leu Leu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro Lys 
1               5                   10                  15      


Pro Lys Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys Val 
            20                  25                  30          


Val Val Asp Val Ser His Glu Asp Pro Glu Val Lys Phe Asn Trp Tyr 
        35                  40                  45              


Val Asp Gly Val Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu Glu 
    50                  55                  60                  


Gln Tyr Asn Ser Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu His 
65                  70                  75                  80  


Gln Asp Trp Leu Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys 
                85                  90                  95      


Ala Leu Pro Ala Pro Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln 
            100                 105                 110         


Pro Arg Glu Pro Glu Val Tyr Thr Leu Pro Pro Ser Arg Glu Glu Met 
        115                 120                 125             


Thr Lys Asn Gln Val Ser Leu Thr Cys Leu Val Lys Gly Phe Tyr Pro 
    130                 135                 140                 


Ser Asp Ile Ala Val Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn 
145                 150                 155                 160 


Tyr Lys Thr Thr Pro Pro Val Leu Asp Ser Asp Gly Ser Phe Phe Leu 
                165                 170                 175     


Thr Ser Lys Leu Thr Val Asp Lys Ser Arg Trp Gln Gln Gly Asn Val 
            180                 185                 190         


Phe Ser Cys Ser Val Met His Glu Ala Leu His Asn His Tyr Thr Gln 
        195                 200                 205             


Lys Ser Leu Ser Leu Ser Pro Gly Lys 
    210                 215         


<210>  68
<211>  217
<212>  PRT
<213>  Artificial

<220>
<223>  Wildtype IgG1 Fc region

<400>  68

Ala Pro Glu Leu Leu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro Lys 
1               5                   10                  15      


Pro Lys Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys Val 
            20                  25                  30          


Val Val Asp Val Ser His Glu Asp Pro Glu Val Lys Phe Asn Trp Tyr 
        35                  40                  45              


Val Asp Gly Val Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu Glu 
    50                  55                  60                  


Gln Tyr Asn Ser Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu His 
65                  70                  75                  80  


Gln Asp Trp Leu Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys 
                85                  90                  95      


Ala Leu Pro Ala Pro Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln 
            100                 105                 110         


Pro Arg Glu Pro Gln Val Tyr Thr Leu Pro Pro Ser Arg Asp Glu Leu 
        115                 120                 125             


Thr Lys Asn Gln Val Ser Leu Thr Cys Leu Val Lys Gly Phe Tyr Pro 
    130                 135                 140                 


Ser Asp Ile Ala Val Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn 
145                 150                 155                 160 


Tyr Lys Thr Thr Pro Pro Val Leu Asp Ser Asp Gly Ser Phe Phe Leu 
                165                 170                 175     


Tyr Ser Lys Leu Thr Val Asp Lys Ser Arg Trp Gln Gln Gly Asn Val 
            180                 185                 190         


Phe Ser Cys Ser Val Met His Glu Ala Leu His Asn His Tyr Thr Gln 
        195                 200                 205             


Lys Ser Leu Ser Leu Ser Pro Gly Lys 
    210                 215         


<210>  69
<211>  98
<212>  PRT
<213>  Artificial

<220>
<223>  Heavy chain CH1 domain

<400>  69

Ala Ser Thr Lys Gly Pro Ser Val Phe Pro Leu Ala Pro Ser Ser Lys 
1               5                   10                  15      


Ser Thr Ser Gly Gly Thr Ala Ala Leu Gly Cys Leu Val Lys Asp Tyr 
            20                  25                  30          


Phe Pro Glu Pro Val Thr Val Ser Trp Asn Ser Gly Ala Leu Thr Ser 
        35                  40                  45              


Gly Val His Thr Phe Pro Ala Val Leu Gln Ser Ser Gly Leu Tyr Ser 
    50                  55                  60                  


Leu Ser Ser Val Val Thr Val Pro Ser Ser Ser Leu Gly Thr Gln Thr 
65                  70                  75                  80  


Tyr Ile Cys Asn Val Asn His Lys Pro Ser Asn Thr Lys Val Asp Lys 
                85                  90                  95      


Lys Val 
        


<210>  70
<211>  107
<212>  PRT
<213>  Artificial

<220>
<223>  Light chain constant domain

<400>  70

Arg Thr Val Ala Ala Pro Ser Val Phe Ile Phe Pro Pro Ser Asp Glu 
1               5                   10                  15      


Gln Leu Lys Ser Gly Thr Ala Ser Val Val Cys Leu Leu Asn Asn Phe 
            20                  25                  30          


Tyr Pro Arg Glu Ala Lys Val Gln Trp Lys Val Asp Asn Ala Leu Gln 
        35                  40                  45              


Ser Gly Asn Ser Gln Glu Ser Val Thr Glu Gln Asp Ser Lys Asp Ser 
    50                  55                  60                  


Thr Tyr Ser Leu Ser Ser Thr Leu Thr Leu Ser Lys Ala Asp Tyr Glu 
65                  70                  75                  80  


Lys His Lys Val Tyr Ala Cys Glu Val Thr His Gln Gly Leu Ser Ser 
                85                  90                  95      


Pro Val Thr Lys Ser Phe Asn Arg Gly Glu Cys 
            100                 105         


<210>  71
<211>  5
<212>  PRT
<213>  Artificial

<220>
<223>  Linker peptide

<400>  71

Gly Gly Gly Gly Ser 
1               5   


<210>  72
<211>  10
<212>  PRT
<213>  Artificial

<220>
<223>  Linker peptide

<400>  72

Gly Gly Gly Gly Ser Gly Gly Gly Gly Ser 
1               5                   10  


<210>  73
<211>  15
<212>  PRT
<213>  Artificial

<220>
<223>  Linker peptide

<400>  73

Gly Gly Gly Gly Ser Gly Gly Gly Gly Ser Gly Gly Gly Gly Ser 
1               5                   10                  15  


<210>  74
<211>  356
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 1 sequence of BCMA/CD3 BsAb in BiSpecific-V0 
       format

<400>  74

Gln Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Ala Gly Gly 
1               5                   10                  15      


Ser Leu Arg Leu Ser Cys Ala Ser Ser Gly Arg Leu Phe Arg Tyr Thr 
            20                  25                  30          


Asp Met Ala Trp Tyr Arg Gln Ala Pro Gly Lys Gln Arg Glu Leu Val 
        35                  40                  45              


Ala Phe Ser Tyr Val Ser Gly Arg Thr Asn Tyr Ala Asp Ser Val Lys 
    50                  55                  60                  


Gly Arg Phe Thr Ile Ser Arg Asp Asn Val Lys Lys Val Val Tyr Leu 
65                  70                  75                  80  


Gln Met Ser Ser Leu Thr Pro Glu Asp Thr Ala Val Tyr Tyr Cys Ala 
                85                  90                  95      


Gln Gly Arg Ser Pro Tyr Arg Trp Gly Ser Tyr Ser Ser Met Phe Gly 
            100                 105                 110         


Ser Trp Gly Gln Gly Thr Leu Val Thr Val Ser Ser Glu Pro Lys Ser 
        115                 120                 125             


Cys Asp Lys Thr His Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu Leu 
    130                 135                 140                 


Gly Gly Pro Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu 
145                 150                 155                 160 


Met Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val Ser 
                165                 170                 175     


His Glu Asp Pro Glu Val Lys Phe Asn Trp Tyr Val Asp Gly Val Glu 
            180                 185                 190         


Val His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr 
        195                 200                 205             


Tyr Arg Val Val Ser Val Leu Thr Val Leu His Gln Asp Trp Leu Asn 
    210                 215                 220                 


Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu Pro Ala Pro 
225                 230                 235                 240 


Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Gln 
                245                 250                 255     


Val Tyr Thr Leu Pro Pro Tyr Arg Glu Glu Met Thr Lys Asn Gln Val 
            260                 265                 270         


Ser Leu Tyr Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val 
        275                 280                 285             


Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr Pro 
    290                 295                 300                 


Pro Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Tyr Ser Lys Leu Thr 
305                 310                 315                 320 


Val Asp Lys Ser Arg Trp Gln Gln Gly Asn Val Phe Ser Cys Ser Val 
                325                 330                 335     


Met His Glu Ala Leu His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu 
            340                 345                 350         


Ser Pro Gly Lys 
        355     


<210>  75
<211>  356
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 1 sequence of BCMA/CD3 BsAb in BiSpecific-V0 
       format

<400>  75

Gln Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Ala Gly Gly 
1               5                   10                  15      


Ser Leu Arg Leu Ser Cys Ala Ser Ser Gly Arg Leu Phe Arg Tyr Thr 
            20                  25                  30          


Asp Met Ala Trp Tyr Arg Gln Ala Pro Gly Lys Gln Arg Glu Leu Val 
        35                  40                  45              


Ala Phe Ser Tyr Val Ser Gly Arg Thr Asn Tyr Ala Asp Ser Val Lys 
    50                  55                  60                  


Gly Arg Phe Thr Ile Ser Arg Asp Asn Val Lys Lys Val Val Tyr Leu 
65                  70                  75                  80  


Gln Met Ser Ser Leu Thr Pro Glu Asp Thr Ala Val Tyr Tyr Cys Ala 
                85                  90                  95      


Gln Gly Arg Ser Pro Tyr Arg Trp Gly Ser Tyr Ser Ser Met Phe Gly 
            100                 105                 110         


Ser Trp Gly Gln Gly Thr Leu Val Thr Val Ser Ser Gly Gly Gly Gly 
        115                 120                 125             


Ser Asp Lys Thr His Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu Leu 
    130                 135                 140                 


Gly Gly Pro Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu 
145                 150                 155                 160 


Met Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val Ser 
                165                 170                 175     


His Glu Asp Pro Glu Val Lys Phe Asn Trp Tyr Val Asp Gly Val Glu 
            180                 185                 190         


Val His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr 
        195                 200                 205             


Tyr Arg Val Val Ser Val Leu Thr Val Leu His Gln Asp Trp Leu Asn 
    210                 215                 220                 


Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu Pro Ala Pro 
225                 230                 235                 240 


Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Gln 
                245                 250                 255     


Val Tyr Thr Leu Pro Pro Tyr Arg Glu Glu Met Thr Lys Asn Gln Val 
            260                 265                 270         


Ser Leu Tyr Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val 
        275                 280                 285             


Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr Pro 
    290                 295                 300                 


Pro Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Tyr Ser Lys Leu Thr 
305                 310                 315                 320 


Val Asp Lys Ser Arg Trp Gln Gln Gly Asn Val Phe Ser Cys Ser Val 
                325                 330                 335     


Met His Glu Ala Leu His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu 
            340                 345                 350         


Ser Pro Gly Lys 
        355     


<210>  76
<211>  351
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 2 sequence of BCMA/CD3 BsAb in BiSpecific-V0 
       format

<400>  76

Gln Val Gln Leu Val Gln Ser Gly Ala Glu Val Lys Lys Pro Gly Ala 
1               5                   10                  15      


Ser Val Lys Met Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Ser Tyr 
            20                  25                  30          


Thr Met His Trp Val Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile 
        35                  40                  45              


Ser Tyr Ile Asn Pro Ser Ser Gly Tyr Thr Lys Tyr Asn Gln Lys Phe 
    50                  55                  60                  


Lys Asp Arg Ala Thr Leu Thr Ala Asp Lys Ser Thr Ser Thr Ala Tyr 
65                  70                  75                  80  


Met Glu Leu Ser Ser Leu Arg Ser Glu Asp Thr Ala Val Tyr Tyr Cys 
                85                  90                  95      


Ala Arg Trp Gln Asp Tyr Asp Val Tyr Phe Asp Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Leu Val Thr Val Ser Ser Glu Pro Lys Ser Cys Asp Lys Thr His 
        115                 120                 125             


Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu Leu Gly Gly Pro Ser Val 
    130                 135                 140                 


Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu Met Ile Ser Arg Thr 
145                 150                 155                 160 


Pro Glu Val Thr Cys Val Val Val Asp Val Ser His Glu Asp Pro Glu 
                165                 170                 175     


Val Lys Phe Asn Trp Tyr Val Asp Gly Val Glu Val His Asn Ala Lys 
            180                 185                 190         


Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr Tyr Arg Val Val Ser 
        195                 200                 205             


Val Leu Thr Val Leu His Gln Asp Trp Leu Asn Gly Lys Glu Tyr Lys 
    210                 215                 220                 


Cys Lys Val Ser Asn Lys Ala Leu Pro Ala Pro Ile Glu Lys Thr Ile 
225                 230                 235                 240 


Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Glu Val Tyr Thr Leu Pro 
                245                 250                 255     


Pro Ser Arg Glu Glu Met Thr Lys Asn Gln Val Ser Leu Thr Cys Leu 
            260                 265                 270         


Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val Glu Trp Glu Ser Asn 
        275                 280                 285             


Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr Pro Pro Val Leu Asp Ser 
    290                 295                 300                 


Asp Gly Ser Phe Phe Leu Thr Ser Lys Leu Thr Val Asp Lys Ser Arg 
305                 310                 315                 320 


Trp Gln Gln Gly Asn Val Phe Ser Cys Ser Val Met His Glu Ala Leu 
                325                 330                 335     


His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu Ser Pro Gly Lys 
            340                 345                 350     


<210>  77
<211>  351
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 2 sequence of BCMA/CD3 BsAb in BiSpecific-V0 
       format

<400>  77

Gln Val Gln Leu Val Gln Ser Gly Ala Glu Val Lys Lys Pro Gly Ala 
1               5                   10                  15      


Ser Val Lys Met Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Ser Tyr 
            20                  25                  30          


Thr Met His Trp Val Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile 
        35                  40                  45              


Ser Tyr Ile Asn Pro Ser Ser Gly Tyr Thr Lys Tyr Asn Gln Lys Phe 
    50                  55                  60                  


Lys Asp Arg Ala Thr Leu Thr Ala Asp Lys Ser Thr Ser Thr Ala Tyr 
65                  70                  75                  80  


Met Glu Leu Ser Ser Leu Arg Ser Glu Asp Thr Ala Val Tyr Tyr Cys 
                85                  90                  95      


Ala Arg Trp Gln Asp Tyr Asp Val Tyr Phe Asp Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Leu Val Thr Val Ser Ser Gly Gly Gly Gly Ser Asp Lys Thr His 
        115                 120                 125             


Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu Leu Gly Gly Pro Ser Val 
    130                 135                 140                 


Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu Met Ile Ser Arg Thr 
145                 150                 155                 160 


Pro Glu Val Thr Cys Val Val Val Asp Val Ser His Glu Asp Pro Glu 
                165                 170                 175     


Val Lys Phe Asn Trp Tyr Val Asp Gly Val Glu Val His Asn Ala Lys 
            180                 185                 190         


Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr Tyr Arg Val Val Ser 
        195                 200                 205             


Val Leu Thr Val Leu His Gln Asp Trp Leu Asn Gly Lys Glu Tyr Lys 
    210                 215                 220                 


Cys Lys Val Ser Asn Lys Ala Leu Pro Ala Pro Ile Glu Lys Thr Ile 
225                 230                 235                 240 


Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Glu Val Tyr Thr Leu Pro 
                245                 250                 255     


Pro Ser Arg Glu Glu Met Thr Lys Asn Gln Val Ser Leu Thr Cys Leu 
            260                 265                 270         


Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val Glu Trp Glu Ser Asn 
        275                 280                 285             


Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr Pro Pro Val Leu Asp Ser 
    290                 295                 300                 


Asp Gly Ser Phe Phe Leu Thr Ser Lys Leu Thr Val Asp Lys Ser Arg 
305                 310                 315                 320 


Trp Gln Gln Gly Asn Val Phe Ser Cys Ser Val Met His Glu Ala Leu 
                325                 330                 335     


His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu Ser Pro Gly Lys 
            340                 345                 350     


<210>  78
<211>  485
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 1 sequence of BCMA/CD3 TsAb in TriSpecific-V0 
       format

<400>  78

Gln Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Ala Gly Gly 
1               5                   10                  15      


Ser Leu Arg Leu Ser Cys Thr Ala Ser Gly Arg Thr Phe Gly Trp Tyr 
            20                  25                  30          


Thr Met Gly Trp Phe Arg Gln Gly Pro Gly Lys Glu Arg Glu Phe Val 
        35                  40                  45              


Ala Ala Ile Ser Pro Ser Gly Gly Ala Thr Tyr Tyr Ala Asp Ser Val 
    50                  55                  60                  


Lys Gly Arg Phe Thr Ile Ser Arg Asp Tyr Ala Lys Asn Ala Val Tyr 
65                  70                  75                  80  


Leu Gln Met Asn Ser Leu Lys Pro Glu Asp Thr Ala Val Tyr Tyr Cys 
                85                  90                  95      


Asn Ala Arg Leu Trp Gly Leu Gly Ile Arg Asn Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Leu Val Thr Val Ser Ser Gly Gly Gly Gly Ser Gly Gly Gly Gly 
        115                 120                 125             


Ser Gln Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Ala Gly 
    130                 135                 140                 


Gly Ser Leu Arg Leu Ser Cys Ala Ser Ser Gly Arg Leu Phe Arg Tyr 
145                 150                 155                 160 


Thr Asp Met Ala Trp Tyr Arg Gln Ala Pro Gly Lys Gln Arg Glu Leu 
                165                 170                 175     


Val Ala Phe Ser Tyr Val Ser Gly Arg Thr Asn Tyr Ala Asp Ser Val 
            180                 185                 190         


Lys Gly Arg Phe Thr Ile Ser Arg Asp Asn Val Lys Lys Val Val Tyr 
        195                 200                 205             


Leu Gln Met Ser Ser Leu Thr Pro Glu Asp Thr Ala Val Tyr Tyr Cys 
    210                 215                 220                 


Ala Gln Gly Arg Ser Pro Tyr Arg Trp Gly Ser Tyr Ser Ser Met Phe 
225                 230                 235                 240 


Gly Ser Trp Gly Gln Gly Thr Leu Val Thr Val Ser Ser Glu Pro Lys 
                245                 250                 255     


Ser Cys Asp Lys Thr His Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu 
            260                 265                 270         


Leu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr 
        275                 280                 285             


Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val 
    290                 295                 300                 


Ser His Glu Asp Pro Glu Val Lys Phe Asn Trp Tyr Val Asp Gly Val 
305                 310                 315                 320 


Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser 
                325                 330                 335     


Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu His Gln Asp Trp Leu 
            340                 345                 350         


Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu Pro Ala 
        355                 360                 365             


Pro Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro 
    370                 375                 380                 


Gln Val Tyr Thr Leu Pro Pro Tyr Arg Glu Glu Met Thr Lys Asn Gln 
385                 390                 395                 400 


Val Ser Leu Tyr Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala 
                405                 410                 415     


Val Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr 
            420                 425                 430         


Pro Pro Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Tyr Ser Lys Leu 
        435                 440                 445             


Thr Val Asp Lys Ser Arg Trp Gln Gln Gly Asn Val Phe Ser Cys Ser 
    450                 455                 460                 


Val Met His Glu Ala Leu His Asn His Tyr Thr Gln Lys Ser Leu Ser 
465                 470                 475                 480 


Leu Ser Pro Gly Lys 
                485 


<210>  79
<211>  490
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 1 sequence of BCMA/CD3 TsAb in TriSpecific-V0 
       format

<400>  79

Gln Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Ala Gly Gly 
1               5                   10                  15      


Ser Leu Arg Leu Ser Cys Thr Ala Ser Gly Arg Thr Phe Gly Trp Tyr 
            20                  25                  30          


Thr Met Gly Trp Phe Arg Gln Gly Pro Gly Lys Glu Arg Glu Phe Val 
        35                  40                  45              


Ala Ala Ile Ser Pro Ser Gly Gly Ala Thr Tyr Tyr Ala Asp Ser Val 
    50                  55                  60                  


Lys Gly Arg Phe Thr Ile Ser Arg Asp Tyr Ala Lys Asn Ala Val Tyr 
65                  70                  75                  80  


Leu Gln Met Asn Ser Leu Lys Pro Glu Asp Thr Ala Val Tyr Tyr Cys 
                85                  90                  95      


Asn Ala Arg Leu Trp Gly Leu Gly Ile Arg Asn Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Leu Val Thr Val Ser Ser Gly Gly Gly Gly Ser Gly Gly Gly Gly 
        115                 120                 125             


Ser Gly Gly Gly Gly Ser Gln Val Gln Leu Val Glu Ser Gly Gly Gly 
    130                 135                 140                 


Leu Val Gln Ala Gly Gly Ser Leu Arg Leu Ser Cys Ala Ser Ser Gly 
145                 150                 155                 160 


Arg Leu Phe Arg Tyr Thr Asp Met Ala Trp Tyr Arg Gln Ala Pro Gly 
                165                 170                 175     


Lys Gln Arg Glu Leu Val Ala Phe Ser Tyr Val Ser Gly Arg Thr Asn 
            180                 185                 190         


Tyr Ala Asp Ser Val Lys Gly Arg Phe Thr Ile Ser Arg Asp Asn Val 
        195                 200                 205             


Lys Lys Val Val Tyr Leu Gln Met Ser Ser Leu Thr Pro Glu Asp Thr 
    210                 215                 220                 


Ala Val Tyr Tyr Cys Ala Gln Gly Arg Ser Pro Tyr Arg Trp Gly Ser 
225                 230                 235                 240 


Tyr Ser Ser Met Phe Gly Ser Trp Gly Gln Gly Thr Leu Val Thr Val 
                245                 250                 255     


Ser Ser Gly Gly Gly Gly Ser Asp Lys Thr His Thr Cys Pro Pro Cys 
            260                 265                 270         


Pro Ala Pro Glu Leu Leu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro 
        275                 280                 285             


Lys Pro Lys Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys 
    290                 295                 300                 


Val Val Val Asp Val Ser His Glu Asp Pro Glu Val Lys Phe Asn Trp 
305                 310                 315                 320 


Tyr Val Asp Gly Val Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu 
                325                 330                 335     


Glu Gln Tyr Asn Ser Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu 
            340                 345                 350         


His Gln Asp Trp Leu Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn 
        355                 360                 365             


Lys Ala Leu Pro Ala Pro Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly 
    370                 375                 380                 


Gln Pro Arg Glu Pro Gln Val Tyr Thr Leu Pro Pro Tyr Arg Glu Glu 
385                 390                 395                 400 


Met Thr Lys Asn Gln Val Ser Leu Tyr Cys Leu Val Lys Gly Phe Tyr 
                405                 410                 415     


Pro Ser Asp Ile Ala Val Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn 
            420                 425                 430         


Asn Tyr Lys Thr Thr Pro Pro Val Leu Asp Ser Asp Gly Ser Phe Phe 
        435                 440                 445             


Leu Tyr Ser Lys Leu Thr Val Asp Lys Ser Arg Trp Gln Gln Gly Asn 
    450                 455                 460                 


Val Phe Ser Cys Ser Val Met His Glu Ala Leu His Asn His Tyr Thr 
465                 470                 475                 480 


Gln Lys Ser Leu Ser Leu Ser Pro Gly Lys 
                485                 490 


<210>  80
<211>  351
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 2 sequence of BCMA/CD3 TsAb in TriSpecific-V0 
       format

<400>  80

Gln Val Gln Leu Val Gln Ser Gly Ala Glu Val Lys Lys Pro Gly Ala 
1               5                   10                  15      


Ser Val Lys Met Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Ser Tyr 
            20                  25                  30          


Thr Met His Trp Val Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile 
        35                  40                  45              


Ser Tyr Ile Asn Pro Ser Ser Gly Tyr Thr Lys Tyr Asn Gln Lys Phe 
    50                  55                  60                  


Lys Asp Arg Ala Thr Leu Thr Ala Asp Lys Ser Thr Ser Thr Ala Tyr 
65                  70                  75                  80  


Met Glu Leu Ser Ser Leu Arg Ser Glu Asp Thr Ala Val Tyr Tyr Cys 
                85                  90                  95      


Ala Arg Trp Gln Asp Tyr Asp Val Tyr Phe Asp Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Leu Val Thr Val Ser Ser Glu Pro Lys Ser Cys Asp Lys Thr His 
        115                 120                 125             


Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu Leu Gly Gly Pro Ser Val 
    130                 135                 140                 


Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu Met Ile Ser Arg Thr 
145                 150                 155                 160 


Pro Glu Val Thr Cys Val Val Val Asp Val Ser His Glu Asp Pro Glu 
                165                 170                 175     


Val Lys Phe Asn Trp Tyr Val Asp Gly Val Glu Val His Asn Ala Lys 
            180                 185                 190         


Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr Tyr Arg Val Val Ser 
        195                 200                 205             


Val Leu Thr Val Leu His Gln Asp Trp Leu Asn Gly Lys Glu Tyr Lys 
    210                 215                 220                 


Cys Lys Val Ser Asn Lys Ala Leu Pro Ala Pro Ile Glu Lys Thr Ile 
225                 230                 235                 240 


Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Glu Val Tyr Thr Leu Pro 
                245                 250                 255     


Pro Ser Arg Glu Glu Met Thr Lys Asn Gln Val Ser Leu Thr Cys Leu 
            260                 265                 270         


Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val Glu Trp Glu Ser Asn 
        275                 280                 285             


Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr Pro Pro Val Leu Asp Ser 
    290                 295                 300                 


Asp Gly Ser Phe Phe Leu Thr Ser Lys Leu Thr Val Asp Lys Ser Arg 
305                 310                 315                 320 


Trp Gln Gln Gly Asn Val Phe Ser Cys Ser Val Met His Glu Ala Leu 
                325                 330                 335     


His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu Ser Pro Gly Lys 
            340                 345                 350     


<210>  81
<211>  351
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 2 sequence of BCMA/CD3 TsAb in TriSpecific-V0 
       format

<400>  81

Gln Val Gln Leu Val Gln Ser Gly Ala Glu Val Lys Lys Pro Gly Ala 
1               5                   10                  15      


Ser Val Lys Met Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Ser Tyr 
            20                  25                  30          


Thr Met His Trp Val Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile 
        35                  40                  45              


Ser Tyr Ile Asn Pro Ser Ser Gly Tyr Thr Lys Tyr Asn Gln Lys Phe 
    50                  55                  60                  


Lys Asp Arg Ala Thr Leu Thr Ala Asp Lys Ser Thr Ser Thr Ala Tyr 
65                  70                  75                  80  


Met Glu Leu Ser Ser Leu Arg Ser Glu Asp Thr Ala Val Tyr Tyr Cys 
                85                  90                  95      


Ala Arg Trp Gln Asp Tyr Asp Val Tyr Phe Asp Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Leu Val Thr Val Ser Ser Gly Gly Gly Gly Ser Asp Lys Thr His 
        115                 120                 125             


Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu Leu Gly Gly Pro Ser Val 
    130                 135                 140                 


Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu Met Ile Ser Arg Thr 
145                 150                 155                 160 


Pro Glu Val Thr Cys Val Val Val Asp Val Ser His Glu Asp Pro Glu 
                165                 170                 175     


Val Lys Phe Asn Trp Tyr Val Asp Gly Val Glu Val His Asn Ala Lys 
            180                 185                 190         


Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr Tyr Arg Val Val Ser 
        195                 200                 205             


Val Leu Thr Val Leu His Gln Asp Trp Leu Asn Gly Lys Glu Tyr Lys 
    210                 215                 220                 


Cys Lys Val Ser Asn Lys Ala Leu Pro Ala Pro Ile Glu Lys Thr Ile 
225                 230                 235                 240 


Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Glu Val Tyr Thr Leu Pro 
                245                 250                 255     


Pro Ser Arg Glu Glu Met Thr Lys Asn Gln Val Ser Leu Thr Cys Leu 
            260                 265                 270         


Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val Glu Trp Glu Ser Asn 
        275                 280                 285             


Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr Pro Pro Val Leu Asp Ser 
    290                 295                 300                 


Asp Gly Ser Phe Phe Leu Thr Ser Lys Leu Thr Val Asp Lys Ser Arg 
305                 310                 315                 320 


Trp Gln Gln Gly Asn Val Phe Ser Cys Ser Val Met His Glu Ala Leu 
                325                 330                 335     


His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu Ser Pro Gly Lys 
            340                 345                 350     


<210>  82
<211>  356
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 1 sequence of BCMA/CD3 BsAb in BiSpecific-V1 
       format

<400>  82

Gln Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Ala Gly Gly 
1               5                   10                  15      


Ser Leu Arg Leu Ser Cys Ala Ser Ser Gly Arg Leu Phe Arg Tyr Thr 
            20                  25                  30          


Asp Met Ala Trp Tyr Arg Gln Ala Pro Gly Lys Gln Arg Glu Leu Val 
        35                  40                  45              


Ala Phe Ser Tyr Val Ser Gly Arg Thr Asn Tyr Ala Asp Ser Val Lys 
    50                  55                  60                  


Gly Arg Phe Thr Ile Ser Arg Asp Asn Val Lys Lys Val Val Tyr Leu 
65                  70                  75                  80  


Gln Met Ser Ser Leu Thr Pro Glu Asp Thr Ala Val Tyr Tyr Cys Ala 
                85                  90                  95      


Gln Gly Arg Ser Pro Tyr Arg Trp Gly Ser Tyr Ser Ser Met Phe Gly 
            100                 105                 110         


Ser Trp Gly Gln Gly Thr Leu Val Thr Val Ser Ser Glu Pro Lys Ser 
        115                 120                 125             


Cys Asp Lys Thr His Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu Leu 
    130                 135                 140                 


Gly Gly Pro Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu 
145                 150                 155                 160 


Met Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val Ser 
                165                 170                 175     


His Glu Asp Pro Glu Val Lys Phe Asn Trp Tyr Val Asp Gly Val Glu 
            180                 185                 190         


Val His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr 
        195                 200                 205             


Tyr Arg Val Val Ser Val Leu Thr Val Leu His Gln Asp Trp Leu Asn 
    210                 215                 220                 


Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu Pro Ala Pro 
225                 230                 235                 240 


Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Gln 
                245                 250                 255     


Val Tyr Thr Leu Pro Pro Tyr Arg Glu Glu Met Thr Lys Asn Gln Val 
            260                 265                 270         


Ser Leu Tyr Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val 
        275                 280                 285             


Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr Pro 
    290                 295                 300                 


Pro Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Tyr Ser Lys Leu Thr 
305                 310                 315                 320 


Val Asp Lys Ser Arg Trp Gln Gln Gly Asn Val Phe Ser Cys Ser Val 
                325                 330                 335     


Met His Glu Ala Leu His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu 
            340                 345                 350         


Ser Pro Gly Lys 
        355     


<210>  83
<211>  356
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 1 sequence of BCMA/CD3 BsAb in BiSpecific-V1 
       format

<400>  83

Gln Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Ala Gly Gly 
1               5                   10                  15      


Ser Leu Arg Leu Ser Cys Ala Ser Ser Gly Arg Leu Phe Arg Tyr Thr 
            20                  25                  30          


Asp Met Ala Trp Tyr Arg Gln Ala Pro Gly Lys Gln Arg Glu Leu Val 
        35                  40                  45              


Ala Phe Ser Tyr Val Ser Gly Arg Thr Asn Tyr Ala Asp Ser Val Lys 
    50                  55                  60                  


Gly Arg Phe Thr Ile Ser Arg Asp Asn Val Lys Lys Val Val Tyr Leu 
65                  70                  75                  80  


Gln Met Ser Ser Leu Thr Pro Glu Asp Thr Ala Val Tyr Tyr Cys Ala 
                85                  90                  95      


Gln Gly Arg Ser Pro Tyr Arg Trp Gly Ser Tyr Ser Ser Met Phe Gly 
            100                 105                 110         


Ser Trp Gly Gln Gly Thr Leu Val Thr Val Ser Ser Gly Gly Gly Gly 
        115                 120                 125             


Ser Asp Lys Thr His Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu Leu 
    130                 135                 140                 


Gly Gly Pro Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu 
145                 150                 155                 160 


Met Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val Ser 
                165                 170                 175     


His Glu Asp Pro Glu Val Lys Phe Asn Trp Tyr Val Asp Gly Val Glu 
            180                 185                 190         


Val His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr 
        195                 200                 205             


Tyr Arg Val Val Ser Val Leu Thr Val Leu His Gln Asp Trp Leu Asn 
    210                 215                 220                 


Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu Pro Ala Pro 
225                 230                 235                 240 


Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Gln 
                245                 250                 255     


Val Tyr Thr Leu Pro Pro Tyr Arg Glu Glu Met Thr Lys Asn Gln Val 
            260                 265                 270         


Ser Leu Tyr Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val 
        275                 280                 285             


Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr Pro 
    290                 295                 300                 


Pro Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Tyr Ser Lys Leu Thr 
305                 310                 315                 320 


Val Asp Lys Ser Arg Trp Gln Gln Gly Asn Val Phe Ser Cys Ser Val 
                325                 330                 335     


Met His Glu Ala Leu His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu 
            340                 345                 350         


Ser Pro Gly Lys 
        355     


<210>  84
<211>  449
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 2 sequence of BCMA/CD3 BsAb in BiSpecific-V1 
       format

<400>  84

Gln Val Gln Leu Gln Gln Ser Gly Ala Glu Leu Ala Arg Pro Gly Ala 
1               5                   10                  15      


Ser Val Lys Met Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Ser Tyr 
            20                  25                  30          


Thr Met His Trp Val Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile 
        35                  40                  45              


Gly Tyr Ile Asn Pro Ser Ser Gly Tyr Thr Lys Tyr Asn Gln Lys Phe 
    50                  55                  60                  


Lys Asp Lys Ala Thr Leu Thr Ala Asp Lys Ser Ser Ser Thr Ala Tyr 
65                  70                  75                  80  


Met Gln Leu Ser Ser Leu Thr Ser Glu Asp Ser Ala Val Tyr Tyr Cys 
                85                  90                  95      


Ala Arg Trp Gln Asp Tyr Asp Val Tyr Phe Asp Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Thr Leu Thr Val Ser Ser Ala Ser Thr Lys Gly Pro Ser Val Phe 
        115                 120                 125             


Pro Leu Ala Pro Ser Ser Lys Ser Thr Ser Gly Gly Thr Ala Ala Leu 
    130                 135                 140                 


Gly Cys Leu Val Lys Asp Tyr Phe Pro Glu Pro Val Thr Val Ser Trp 
145                 150                 155                 160 


Asn Ser Gly Ala Leu Thr Ser Gly Val His Thr Phe Pro Ala Val Leu 
                165                 170                 175     


Gln Ser Ser Gly Leu Tyr Ser Leu Ser Ser Val Val Thr Val Pro Ser 
            180                 185                 190         


Ser Ser Leu Gly Thr Gln Thr Tyr Ile Cys Asn Val Asn His Lys Pro 
        195                 200                 205             


Ser Asn Thr Lys Val Asp Lys Lys Val Glu Pro Lys Ser Cys Asp Lys 
    210                 215                 220                 


Thr His Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu Leu Gly Gly Pro 
225                 230                 235                 240 


Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu Met Ile Ser 
                245                 250                 255     


Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val Ser His Glu Asp 
            260                 265                 270         


Pro Glu Val Lys Phe Asn Trp Tyr Val Asp Gly Val Glu Val His Asn 
        275                 280                 285             


Ala Lys Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr Tyr Arg Val 
    290                 295                 300                 


Val Ser Val Leu Thr Val Leu His Gln Asp Trp Leu Asn Gly Lys Glu 
305                 310                 315                 320 


Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu Pro Ala Pro Ile Glu Lys 
                325                 330                 335     


Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Glu Val Tyr Thr 
            340                 345                 350         


Leu Pro Pro Ser Arg Glu Glu Met Thr Lys Asn Gln Val Ser Leu Thr 
        355                 360                 365             


Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val Glu Trp Glu 
    370                 375                 380                 


Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr Pro Pro Val Leu 
385                 390                 395                 400 


Asp Ser Asp Gly Ser Phe Phe Leu Thr Ser Lys Leu Thr Val Asp Lys 
                405                 410                 415     


Ser Arg Trp Gln Gln Gly Asn Val Phe Ser Cys Ser Val Met His Glu 
            420                 425                 430         


Ala Leu His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu Ser Pro Gly 
        435                 440                 445             


Lys 
    


<210>  85
<211>  449
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 2 sequence of BCMA/CD3 BsAb in BiSpecific-V1 
       format

<400>  85

Gln Val Gln Leu Gln Gln Ser Gly Ala Glu Leu Ala Arg Pro Gly Ala 
1               5                   10                  15      


Ser Val Lys Met Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Ser Tyr 
            20                  25                  30          


Thr Met His Trp Val Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile 
        35                  40                  45              


Gly Tyr Ile Asn Pro Ser Ser Gly Tyr Thr Lys Tyr Asn Gln Lys Phe 
    50                  55                  60                  


Lys Asp Lys Ala Thr Leu Thr Ala Asp Lys Ser Ser Ser Thr Ala Tyr 
65                  70                  75                  80  


Met Gln Leu Ser Ser Leu Thr Ser Glu Asp Ser Ala Val Tyr Tyr Cys 
                85                  90                  95      


Ala Arg Trp Gln Asp Tyr Asp Val Tyr Phe Asp Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Thr Leu Thr Val Ser Ser Ala Ser Thr Lys Gly Pro Ser Val Phe 
        115                 120                 125             


Pro Leu Ala Pro Ser Ser Lys Ser Thr Ser Gly Gly Thr Ala Ala Leu 
    130                 135                 140                 


Gly Cys Leu Val Lys Asp Tyr Phe Pro Glu Pro Val Thr Val Ser Trp 
145                 150                 155                 160 


Asn Ser Gly Ala Leu Thr Ser Gly Val His Thr Phe Pro Ala Val Leu 
                165                 170                 175     


Gln Ser Ser Gly Leu Tyr Ser Leu Ser Ser Val Val Thr Val Pro Ser 
            180                 185                 190         


Ser Ser Leu Gly Thr Gln Thr Tyr Ile Cys Asn Val Asn His Lys Pro 
        195                 200                 205             


Ser Asn Thr Lys Val Asp Lys Lys Val Gly Gly Gly Gly Ser Asp Lys 
    210                 215                 220                 


Thr His Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu Leu Gly Gly Pro 
225                 230                 235                 240 


Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu Met Ile Ser 
                245                 250                 255     


Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val Ser His Glu Asp 
            260                 265                 270         


Pro Glu Val Lys Phe Asn Trp Tyr Val Asp Gly Val Glu Val His Asn 
        275                 280                 285             


Ala Lys Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr Tyr Arg Val 
    290                 295                 300                 


Val Ser Val Leu Thr Val Leu His Gln Asp Trp Leu Asn Gly Lys Glu 
305                 310                 315                 320 


Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu Pro Ala Pro Ile Glu Lys 
                325                 330                 335     


Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Glu Val Tyr Thr 
            340                 345                 350         


Leu Pro Pro Ser Arg Glu Glu Met Thr Lys Asn Gln Val Ser Leu Thr 
        355                 360                 365             


Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val Glu Trp Glu 
    370                 375                 380                 


Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr Pro Pro Val Leu 
385                 390                 395                 400 


Asp Ser Asp Gly Ser Phe Phe Leu Thr Ser Lys Leu Thr Val Asp Lys 
                405                 410                 415     


Ser Arg Trp Gln Gln Gly Asn Val Phe Ser Cys Ser Val Met His Glu 
            420                 425                 430         


Ala Leu His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu Ser Pro Gly 
        435                 440                 445             


Lys 
    


<210>  86
<211>  213
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 3 sequence of BCMA/CD3 BsAb in BiSpecific-V1 
       format

<400>  86

Gln Ile Val Leu Ser Gln Ser Pro Ala Ile Leu Ser Ala Ser Pro Gly 
1               5                   10                  15      


Glu Lys Val Thr Met Thr Cys Arg Ala Ser Ser Ser Val Ser Tyr Met 
            20                  25                  30          


His Trp Tyr Gln Gln Lys Pro Gly Ser Ser Pro Lys Pro Trp Ile Tyr 
        35                  40                  45              


Ala Ala Ser Asn Arg Ala Ser Gly Val Pro Ala Arg Phe Ser Gly Ser 
    50                  55                  60                  


Gly Ser Gly Thr Ser Tyr Ser Leu Thr Ile Ser Arg Val Glu Ala Glu 
65                  70                  75                  80  


Asp Ala Ala Thr Tyr Tyr Cys Gln Gln Trp Ser Ser Asn Pro Pro Thr 
                85                  90                  95      


Phe Gly Gly Gly Thr Lys Leu Glu Thr Lys Arg Thr Val Ala Ala Pro 
            100                 105                 110         


Ser Val Phe Ile Phe Pro Pro Ser Asp Glu Gln Leu Lys Ser Gly Thr 
        115                 120                 125             


Ala Ser Val Val Cys Leu Leu Asn Asn Phe Tyr Pro Arg Glu Ala Lys 
    130                 135                 140                 


Val Gln Trp Lys Val Asp Asn Ala Leu Gln Ser Gly Asn Ser Gln Glu 
145                 150                 155                 160 


Ser Val Thr Glu Gln Asp Ser Lys Asp Ser Thr Tyr Ser Leu Ser Ser 
                165                 170                 175     


Thr Leu Thr Leu Ser Lys Ala Asp Tyr Glu Lys His Lys Val Tyr Ala 
            180                 185                 190         


Cys Glu Val Thr His Gln Gly Leu Ser Ser Pro Val Thr Lys Ser Phe 
        195                 200                 205             


Asn Arg Gly Glu Cys 
    210             


<210>  87
<211>  485
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 1 sequence of BCMA/CD3 TsAb in TriSpecific-V1 
       format

<400>  87

Gln Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Ala Gly Gly 
1               5                   10                  15      


Ser Leu Arg Leu Ser Cys Thr Ala Ser Gly Arg Thr Phe Gly Trp Tyr 
            20                  25                  30          


Thr Met Gly Trp Phe Arg Gln Gly Pro Gly Lys Glu Arg Glu Phe Val 
        35                  40                  45              


Ala Ala Ile Ser Pro Ser Gly Gly Ala Thr Tyr Tyr Ala Asp Ser Val 
    50                  55                  60                  


Lys Gly Arg Phe Thr Ile Ser Arg Asp Tyr Ala Lys Asn Ala Val Tyr 
65                  70                  75                  80  


Leu Gln Met Asn Ser Leu Lys Pro Glu Asp Thr Ala Val Tyr Tyr Cys 
                85                  90                  95      


Asn Ala Arg Leu Trp Gly Leu Gly Ile Arg Asn Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Leu Val Thr Val Ser Ser Gly Gly Gly Gly Ser Gly Gly Gly Gly 
        115                 120                 125             


Ser Gln Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Ala Gly 
    130                 135                 140                 


Gly Ser Leu Arg Leu Ser Cys Ala Ser Ser Gly Arg Leu Phe Arg Tyr 
145                 150                 155                 160 


Thr Asp Met Ala Trp Tyr Arg Gln Ala Pro Gly Lys Gln Arg Glu Leu 
                165                 170                 175     


Val Ala Phe Ser Tyr Val Ser Gly Arg Thr Asn Tyr Ala Asp Ser Val 
            180                 185                 190         


Lys Gly Arg Phe Thr Ile Ser Arg Asp Asn Val Lys Lys Val Val Tyr 
        195                 200                 205             


Leu Gln Met Ser Ser Leu Thr Pro Glu Asp Thr Ala Val Tyr Tyr Cys 
    210                 215                 220                 


Ala Gln Gly Arg Ser Pro Tyr Arg Trp Gly Ser Tyr Ser Ser Met Phe 
225                 230                 235                 240 


Gly Ser Trp Gly Gln Gly Thr Leu Val Thr Val Ser Ser Glu Pro Lys 
                245                 250                 255     


Ser Cys Asp Lys Thr His Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu 
            260                 265                 270         


Leu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr 
        275                 280                 285             


Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val 
    290                 295                 300                 


Ser His Glu Asp Pro Glu Val Lys Phe Asn Trp Tyr Val Asp Gly Val 
305                 310                 315                 320 


Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser 
                325                 330                 335     


Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu His Gln Asp Trp Leu 
            340                 345                 350         


Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu Pro Ala 
        355                 360                 365             


Pro Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro 
    370                 375                 380                 


Gln Val Tyr Thr Leu Pro Pro Tyr Arg Glu Glu Met Thr Lys Asn Gln 
385                 390                 395                 400 


Val Ser Leu Tyr Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala 
                405                 410                 415     


Val Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr 
            420                 425                 430         


Pro Pro Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Tyr Ser Lys Leu 
        435                 440                 445             


Thr Val Asp Lys Ser Arg Trp Gln Gln Gly Asn Val Phe Ser Cys Ser 
    450                 455                 460                 


Val Met His Glu Ala Leu His Asn His Tyr Thr Gln Lys Ser Leu Ser 
465                 470                 475                 480 


Leu Ser Pro Gly Lys 
                485 


<210>  88
<211>  490
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 1 sequence of BCMA/CD3 TsAb in TriSpecific-V1 
       format

<400>  88

Gln Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Ala Gly Gly 
1               5                   10                  15      


Ser Leu Arg Leu Ser Cys Thr Ala Ser Gly Arg Thr Phe Gly Trp Tyr 
            20                  25                  30          


Thr Met Gly Trp Phe Arg Gln Gly Pro Gly Lys Glu Arg Glu Phe Val 
        35                  40                  45              


Ala Ala Ile Ser Pro Ser Gly Gly Ala Thr Tyr Tyr Ala Asp Ser Val 
    50                  55                  60                  


Lys Gly Arg Phe Thr Ile Ser Arg Asp Tyr Ala Lys Asn Ala Val Tyr 
65                  70                  75                  80  


Leu Gln Met Asn Ser Leu Lys Pro Glu Asp Thr Ala Val Tyr Tyr Cys 
                85                  90                  95      


Asn Ala Arg Leu Trp Gly Leu Gly Ile Arg Asn Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Leu Val Thr Val Ser Ser Gly Gly Gly Gly Ser Gly Gly Gly Gly 
        115                 120                 125             


Ser Gly Gly Gly Gly Ser Gln Val Gln Leu Val Glu Ser Gly Gly Gly 
    130                 135                 140                 


Leu Val Gln Ala Gly Gly Ser Leu Arg Leu Ser Cys Ala Ser Ser Gly 
145                 150                 155                 160 


Arg Leu Phe Arg Tyr Thr Asp Met Ala Trp Tyr Arg Gln Ala Pro Gly 
                165                 170                 175     


Lys Gln Arg Glu Leu Val Ala Phe Ser Tyr Val Ser Gly Arg Thr Asn 
            180                 185                 190         


Tyr Ala Asp Ser Val Lys Gly Arg Phe Thr Ile Ser Arg Asp Asn Val 
        195                 200                 205             


Lys Lys Val Val Tyr Leu Gln Met Ser Ser Leu Thr Pro Glu Asp Thr 
    210                 215                 220                 


Ala Val Tyr Tyr Cys Ala Gln Gly Arg Ser Pro Tyr Arg Trp Gly Ser 
225                 230                 235                 240 


Tyr Ser Ser Met Phe Gly Ser Trp Gly Gln Gly Thr Leu Val Thr Val 
                245                 250                 255     


Ser Ser Gly Gly Gly Gly Ser Asp Lys Thr His Thr Cys Pro Pro Cys 
            260                 265                 270         


Pro Ala Pro Glu Leu Leu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro 
        275                 280                 285             


Lys Pro Lys Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys 
    290                 295                 300                 


Val Val Val Asp Val Ser His Glu Asp Pro Glu Val Lys Phe Asn Trp 
305                 310                 315                 320 


Tyr Val Asp Gly Val Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu 
                325                 330                 335     


Glu Gln Tyr Asn Ser Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu 
            340                 345                 350         


His Gln Asp Trp Leu Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn 
        355                 360                 365             


Lys Ala Leu Pro Ala Pro Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly 
    370                 375                 380                 


Gln Pro Arg Glu Pro Gln Val Tyr Thr Leu Pro Pro Tyr Arg Glu Glu 
385                 390                 395                 400 


Met Thr Lys Asn Gln Val Ser Leu Tyr Cys Leu Val Lys Gly Phe Tyr 
                405                 410                 415     


Pro Ser Asp Ile Ala Val Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn 
            420                 425                 430         


Asn Tyr Lys Thr Thr Pro Pro Val Leu Asp Ser Asp Gly Ser Phe Phe 
        435                 440                 445             


Leu Tyr Ser Lys Leu Thr Val Asp Lys Ser Arg Trp Gln Gln Gly Asn 
    450                 455                 460                 


Val Phe Ser Cys Ser Val Met His Glu Ala Leu His Asn His Tyr Thr 
465                 470                 475                 480 


Gln Lys Ser Leu Ser Leu Ser Pro Gly Lys 
                485                 490 


<210>  89
<211>  449
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 2 sequence of BCMA/CD3 TsAb in TriSpecific-V1 
       format

<400>  89

Gln Val Gln Leu Gln Gln Ser Gly Ala Glu Leu Ala Arg Pro Gly Ala 
1               5                   10                  15      


Ser Val Lys Met Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Ser Tyr 
            20                  25                  30          


Thr Met His Trp Val Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile 
        35                  40                  45              


Gly Tyr Ile Asn Pro Ser Ser Gly Tyr Thr Lys Tyr Asn Gln Lys Phe 
    50                  55                  60                  


Lys Asp Lys Ala Thr Leu Thr Ala Asp Lys Ser Ser Ser Thr Ala Tyr 
65                  70                  75                  80  


Met Gln Leu Ser Ser Leu Thr Ser Glu Asp Ser Ala Val Tyr Tyr Cys 
                85                  90                  95      


Ala Arg Trp Gln Asp Tyr Asp Val Tyr Phe Asp Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Thr Leu Thr Val Ser Ser Ala Ser Thr Lys Gly Pro Ser Val Phe 
        115                 120                 125             


Pro Leu Ala Pro Ser Ser Lys Ser Thr Ser Gly Gly Thr Ala Ala Leu 
    130                 135                 140                 


Gly Cys Leu Val Lys Asp Tyr Phe Pro Glu Pro Val Thr Val Ser Trp 
145                 150                 155                 160 


Asn Ser Gly Ala Leu Thr Ser Gly Val His Thr Phe Pro Ala Val Leu 
                165                 170                 175     


Gln Ser Ser Gly Leu Tyr Ser Leu Ser Ser Val Val Thr Val Pro Ser 
            180                 185                 190         


Ser Ser Leu Gly Thr Gln Thr Tyr Ile Cys Asn Val Asn His Lys Pro 
        195                 200                 205             


Ser Asn Thr Lys Val Asp Lys Lys Val Glu Pro Lys Ser Cys Asp Lys 
    210                 215                 220                 


Thr His Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu Leu Gly Gly Pro 
225                 230                 235                 240 


Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu Met Ile Ser 
                245                 250                 255     


Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val Ser His Glu Asp 
            260                 265                 270         


Pro Glu Val Lys Phe Asn Trp Tyr Val Asp Gly Val Glu Val His Asn 
        275                 280                 285             


Ala Lys Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr Tyr Arg Val 
    290                 295                 300                 


Val Ser Val Leu Thr Val Leu His Gln Asp Trp Leu Asn Gly Lys Glu 
305                 310                 315                 320 


Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu Pro Ala Pro Ile Glu Lys 
                325                 330                 335     


Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Glu Val Tyr Thr 
            340                 345                 350         


Leu Pro Pro Ser Arg Glu Glu Met Thr Lys Asn Gln Val Ser Leu Thr 
        355                 360                 365             


Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val Glu Trp Glu 
    370                 375                 380                 


Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr Pro Pro Val Leu 
385                 390                 395                 400 


Asp Ser Asp Gly Ser Phe Phe Leu Thr Ser Lys Leu Thr Val Asp Lys 
                405                 410                 415     


Ser Arg Trp Gln Gln Gly Asn Val Phe Ser Cys Ser Val Met His Glu 
            420                 425                 430         


Ala Leu His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu Ser Pro Gly 
        435                 440                 445             


Lys 
    


<210>  90
<211>  449
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 2 sequence of BCMA/CD3 TsAb in TriSpecific-V1 
       format

<400>  90

Gln Val Gln Leu Gln Gln Ser Gly Ala Glu Leu Ala Arg Pro Gly Ala 
1               5                   10                  15      


Ser Val Lys Met Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Ser Tyr 
            20                  25                  30          


Thr Met His Trp Val Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile 
        35                  40                  45              


Gly Tyr Ile Asn Pro Ser Ser Gly Tyr Thr Lys Tyr Asn Gln Lys Phe 
    50                  55                  60                  


Lys Asp Lys Ala Thr Leu Thr Ala Asp Lys Ser Ser Ser Thr Ala Tyr 
65                  70                  75                  80  


Met Gln Leu Ser Ser Leu Thr Ser Glu Asp Ser Ala Val Tyr Tyr Cys 
                85                  90                  95      


Ala Arg Trp Gln Asp Tyr Asp Val Tyr Phe Asp Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Thr Leu Thr Val Ser Ser Ala Ser Thr Lys Gly Pro Ser Val Phe 
        115                 120                 125             


Pro Leu Ala Pro Ser Ser Lys Ser Thr Ser Gly Gly Thr Ala Ala Leu 
    130                 135                 140                 


Gly Cys Leu Val Lys Asp Tyr Phe Pro Glu Pro Val Thr Val Ser Trp 
145                 150                 155                 160 


Asn Ser Gly Ala Leu Thr Ser Gly Val His Thr Phe Pro Ala Val Leu 
                165                 170                 175     


Gln Ser Ser Gly Leu Tyr Ser Leu Ser Ser Val Val Thr Val Pro Ser 
            180                 185                 190         


Ser Ser Leu Gly Thr Gln Thr Tyr Ile Cys Asn Val Asn His Lys Pro 
        195                 200                 205             


Ser Asn Thr Lys Val Asp Lys Lys Val Gly Gly Gly Gly Ser Asp Lys 
    210                 215                 220                 


Thr His Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu Leu Gly Gly Pro 
225                 230                 235                 240 


Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu Met Ile Ser 
                245                 250                 255     


Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val Ser His Glu Asp 
            260                 265                 270         


Pro Glu Val Lys Phe Asn Trp Tyr Val Asp Gly Val Glu Val His Asn 
        275                 280                 285             


Ala Lys Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr Tyr Arg Val 
    290                 295                 300                 


Val Ser Val Leu Thr Val Leu His Gln Asp Trp Leu Asn Gly Lys Glu 
305                 310                 315                 320 


Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu Pro Ala Pro Ile Glu Lys 
                325                 330                 335     


Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Glu Val Tyr Thr 
            340                 345                 350         


Leu Pro Pro Ser Arg Glu Glu Met Thr Lys Asn Gln Val Ser Leu Thr 
        355                 360                 365             


Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val Glu Trp Glu 
    370                 375                 380                 


Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr Pro Pro Val Leu 
385                 390                 395                 400 


Asp Ser Asp Gly Ser Phe Phe Leu Thr Ser Lys Leu Thr Val Asp Lys 
                405                 410                 415     


Ser Arg Trp Gln Gln Gly Asn Val Phe Ser Cys Ser Val Met His Glu 
            420                 425                 430         


Ala Leu His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu Ser Pro Gly 
        435                 440                 445             


Lys 
    


<210>  91
<211>  213
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 3 sequence of BCMA/CD3 TsAb in TriSpecific-V1 
       format

<400>  91

Gln Ile Val Leu Ser Gln Ser Pro Ala Ile Leu Ser Ala Ser Pro Gly 
1               5                   10                  15      


Glu Lys Val Thr Met Thr Cys Arg Ala Ser Ser Ser Val Ser Tyr Met 
            20                  25                  30          


His Trp Tyr Gln Gln Lys Pro Gly Ser Ser Pro Lys Pro Trp Ile Tyr 
        35                  40                  45              


Ala Ala Ser Asn Arg Ala Ser Gly Val Pro Ala Arg Phe Ser Gly Ser 
    50                  55                  60                  


Gly Ser Gly Thr Ser Tyr Ser Leu Thr Ile Ser Arg Val Glu Ala Glu 
65                  70                  75                  80  


Asp Ala Ala Thr Tyr Tyr Cys Gln Gln Trp Ser Ser Asn Pro Pro Thr 
                85                  90                  95      


Phe Gly Gly Gly Thr Lys Leu Glu Thr Lys Arg Thr Val Ala Ala Pro 
            100                 105                 110         


Ser Val Phe Ile Phe Pro Pro Ser Asp Glu Gln Leu Lys Ser Gly Thr 
        115                 120                 125             


Ala Ser Val Val Cys Leu Leu Asn Asn Phe Tyr Pro Arg Glu Ala Lys 
    130                 135                 140                 


Val Gln Trp Lys Val Asp Asn Ala Leu Gln Ser Gly Asn Ser Gln Glu 
145                 150                 155                 160 


Ser Val Thr Glu Gln Asp Ser Lys Asp Ser Thr Tyr Ser Leu Ser Ser 
                165                 170                 175     


Thr Leu Thr Leu Ser Lys Ala Asp Tyr Glu Lys His Lys Val Tyr Ala 
            180                 185                 190         


Cys Glu Val Thr His Gln Gly Leu Ser Ser Pro Val Thr Lys Ser Phe 
        195                 200                 205             


Asn Arg Gly Glu Cys 
    210             


<210>  92
<211>  356
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 1 sequence of BCMA/CD3 BsAb in BiSpecific-V2 
       format

<400>  92

Gln Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Ala Gly Gly 
1               5                   10                  15      


Ser Leu Arg Leu Ser Cys Ala Ser Ser Gly Arg Leu Phe Arg Tyr Thr 
            20                  25                  30          


Asp Met Ala Trp Tyr Arg Gln Ala Pro Gly Lys Gln Arg Glu Leu Val 
        35                  40                  45              


Ala Phe Ser Tyr Val Ser Gly Arg Thr Asn Tyr Ala Asp Ser Val Lys 
    50                  55                  60                  


Gly Arg Phe Thr Ile Ser Arg Asp Asn Val Lys Lys Val Val Tyr Leu 
65                  70                  75                  80  


Gln Met Ser Ser Leu Thr Pro Glu Asp Thr Ala Val Tyr Tyr Cys Ala 
                85                  90                  95      


Gln Gly Arg Ser Pro Tyr Arg Trp Gly Ser Tyr Ser Ser Met Phe Gly 
            100                 105                 110         


Ser Trp Gly Gln Gly Thr Leu Val Thr Val Ser Ser Glu Pro Lys Ser 
        115                 120                 125             


Cys Asp Lys Thr His Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu Leu 
    130                 135                 140                 


Gly Gly Pro Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu 
145                 150                 155                 160 


Met Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val Ser 
                165                 170                 175     


His Glu Asp Pro Glu Val Lys Phe Asn Trp Tyr Val Asp Gly Val Glu 
            180                 185                 190         


Val His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr 
        195                 200                 205             


Tyr Arg Val Val Ser Val Leu Thr Val Leu His Gln Asp Trp Leu Asn 
    210                 215                 220                 


Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu Pro Ala Pro 
225                 230                 235                 240 


Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Gln 
                245                 250                 255     


Val Tyr Thr Leu Pro Pro Tyr Arg Glu Glu Met Thr Lys Asn Gln Val 
            260                 265                 270         


Ser Leu Tyr Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val 
        275                 280                 285             


Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr Pro 
    290                 295                 300                 


Pro Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Tyr Ser Lys Leu Thr 
305                 310                 315                 320 


Val Asp Lys Ser Arg Trp Gln Gln Gly Asn Val Phe Ser Cys Ser Val 
                325                 330                 335     


Met His Glu Ala Leu His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu 
            340                 345                 350         


Ser Pro Gly Lys 
        355     


<210>  93
<211>  356
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 1 sequence of BCMA/CD3 BsAb in BiSpecific-V2 
       format

<400>  93

Gln Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Ala Gly Gly 
1               5                   10                  15      


Ser Leu Arg Leu Ser Cys Ala Ser Ser Gly Arg Leu Phe Arg Tyr Thr 
            20                  25                  30          


Asp Met Ala Trp Tyr Arg Gln Ala Pro Gly Lys Gln Arg Glu Leu Val 
        35                  40                  45              


Ala Phe Ser Tyr Val Ser Gly Arg Thr Asn Tyr Ala Asp Ser Val Lys 
    50                  55                  60                  


Gly Arg Phe Thr Ile Ser Arg Asp Asn Val Lys Lys Val Val Tyr Leu 
65                  70                  75                  80  


Gln Met Ser Ser Leu Thr Pro Glu Asp Thr Ala Val Tyr Tyr Cys Ala 
                85                  90                  95      


Gln Gly Arg Ser Pro Tyr Arg Trp Gly Ser Tyr Ser Ser Met Phe Gly 
            100                 105                 110         


Ser Trp Gly Gln Gly Thr Leu Val Thr Val Ser Ser Gly Gly Gly Gly 
        115                 120                 125             


Ser Asp Lys Thr His Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu Leu 
    130                 135                 140                 


Gly Gly Pro Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu 
145                 150                 155                 160 


Met Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val Ser 
                165                 170                 175     


His Glu Asp Pro Glu Val Lys Phe Asn Trp Tyr Val Asp Gly Val Glu 
            180                 185                 190         


Val His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr 
        195                 200                 205             


Tyr Arg Val Val Ser Val Leu Thr Val Leu His Gln Asp Trp Leu Asn 
    210                 215                 220                 


Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu Pro Ala Pro 
225                 230                 235                 240 


Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Gln 
                245                 250                 255     


Val Tyr Thr Leu Pro Pro Tyr Arg Glu Glu Met Thr Lys Asn Gln Val 
            260                 265                 270         


Ser Leu Tyr Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val 
        275                 280                 285             


Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr Pro 
    290                 295                 300                 


Pro Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Tyr Ser Lys Leu Thr 
305                 310                 315                 320 


Val Asp Lys Ser Arg Trp Gln Gln Gly Asn Val Phe Ser Cys Ser Val 
                325                 330                 335     


Met His Glu Ala Leu His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu 
            340                 345                 350         


Ser Pro Gly Lys 
        355     


<210>  94
<211>  472
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 2 sequence of BCMA/CD3 BsAb in BiSpecific-V2 
       format

<400>  94

Gln Val Gln Leu Gln Gln Ser Gly Ala Glu Leu Ala Arg Pro Gly Ala 
1               5                   10                  15      


Ser Val Lys Met Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Ser Tyr 
            20                  25                  30          


Thr Met His Trp Val Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile 
        35                  40                  45              


Gly Tyr Ile Asn Pro Ser Ser Gly Tyr Thr Lys Tyr Asn Gln Lys Phe 
    50                  55                  60                  


Lys Asp Lys Ala Thr Leu Thr Ala Asp Lys Ser Ser Ser Thr Ala Tyr 
65                  70                  75                  80  


Met Gln Leu Ser Ser Leu Thr Ser Glu Asp Ser Ala Val Tyr Tyr Cys 
                85                  90                  95      


Ala Arg Trp Gln Asp Tyr Asp Val Tyr Phe Asp Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Thr Leu Thr Val Ser Ser Gly Gly Gly Gly Ser Gly Gly Gly Gly 
        115                 120                 125             


Ser Gly Gly Gly Gly Ser Gln Ile Val Leu Ser Gln Ser Pro Ala Ile 
    130                 135                 140                 


Leu Ser Ala Ser Pro Gly Glu Lys Val Thr Met Thr Cys Arg Ala Ser 
145                 150                 155                 160 


Ser Ser Val Ser Tyr Met His Trp Tyr Gln Gln Lys Pro Gly Ser Ser 
                165                 170                 175     


Pro Lys Pro Trp Ile Tyr Ala Ala Ser Asn Arg Ala Ser Gly Val Pro 
            180                 185                 190         


Ala Arg Phe Ser Gly Ser Gly Ser Gly Thr Ser Tyr Ser Leu Thr Ile 
        195                 200                 205             


Ser Arg Val Glu Ala Glu Asp Ala Ala Thr Tyr Tyr Cys Gln Gln Trp 
    210                 215                 220                 


Ser Ser Asn Pro Pro Thr Phe Gly Gly Gly Thr Lys Leu Glu Thr Lys 
225                 230                 235                 240 


Gly Gly Gly Gly Ser Asp Lys Thr His Thr Cys Pro Pro Cys Pro Ala 
                245                 250                 255     


Pro Glu Leu Leu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro Lys Pro 
            260                 265                 270         


Lys Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val 
        275                 280                 285             


Val Asp Val Ser His Glu Asp Pro Glu Val Lys Phe Asn Trp Tyr Val 
    290                 295                 300                 


Asp Gly Val Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln 
305                 310                 315                 320 


Tyr Asn Ser Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu His Gln 
                325                 330                 335     


Asp Trp Leu Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys Ala 
            340                 345                 350         


Leu Pro Ala Pro Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln Pro 
        355                 360                 365             


Arg Glu Pro Glu Val Tyr Thr Leu Pro Pro Ser Arg Glu Glu Met Thr 
    370                 375                 380                 


Lys Asn Gln Val Ser Leu Thr Cys Leu Val Lys Gly Phe Tyr Pro Ser 
385                 390                 395                 400 


Asp Ile Ala Val Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr 
                405                 410                 415     


Lys Thr Thr Pro Pro Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Thr 
            420                 425                 430         


Ser Lys Leu Thr Val Asp Lys Ser Arg Trp Gln Gln Gly Asn Val Phe 
        435                 440                 445             


Ser Cys Ser Val Met His Glu Ala Leu His Asn His Tyr Thr Gln Lys 
    450                 455                 460                 


Ser Leu Ser Leu Ser Pro Gly Lys 
465                 470         


<210>  95
<211>  472
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 2 sequence of BCMA/CD3 BsAb in BiSpecific-V2 
       format

<400>  95

Gln Val Gln Leu Gln Gln Ser Gly Ala Glu Leu Ala Arg Pro Gly Ala 
1               5                   10                  15      


Ser Val Lys Met Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Ser Tyr 
            20                  25                  30          


Thr Met His Trp Val Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile 
        35                  40                  45              


Gly Tyr Ile Asn Pro Ser Ser Gly Tyr Thr Lys Tyr Asn Gln Lys Phe 
    50                  55                  60                  


Lys Asp Lys Ala Thr Leu Thr Ala Asp Lys Ser Ser Ser Thr Ala Tyr 
65                  70                  75                  80  


Met Gln Leu Ser Ser Leu Thr Ser Glu Asp Ser Ala Val Tyr Tyr Cys 
                85                  90                  95      


Ala Arg Trp Gln Asp Tyr Asp Val Tyr Phe Asp Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Thr Leu Thr Val Ser Ser Gly Gly Gly Gly Ser Gly Gly Gly Gly 
        115                 120                 125             


Ser Gly Gly Gly Gly Ser Gln Ile Val Leu Ser Gln Ser Pro Ala Ile 
    130                 135                 140                 


Leu Ser Ala Ser Pro Gly Glu Lys Val Thr Met Thr Cys Arg Ala Ser 
145                 150                 155                 160 


Ser Ser Val Ser Tyr Met His Trp Tyr Gln Gln Lys Pro Gly Ser Ser 
                165                 170                 175     


Pro Lys Pro Trp Ile Tyr Ala Ala Ser Asn Arg Ala Ser Gly Val Pro 
            180                 185                 190         


Ala Arg Phe Ser Gly Ser Gly Ser Gly Thr Ser Tyr Ser Leu Thr Ile 
        195                 200                 205             


Ser Arg Val Glu Ala Glu Asp Ala Ala Thr Tyr Tyr Cys Gln Gln Trp 
    210                 215                 220                 


Ser Ser Asn Pro Pro Thr Phe Gly Gly Gly Thr Lys Leu Glu Thr Lys 
225                 230                 235                 240 


Glu Pro Lys Ser Cys Asp Lys Thr His Thr Cys Pro Pro Cys Pro Ala 
                245                 250                 255     


Pro Glu Leu Leu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro Lys Pro 
            260                 265                 270         


Lys Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val 
        275                 280                 285             


Val Asp Val Ser His Glu Asp Pro Glu Val Lys Phe Asn Trp Tyr Val 
    290                 295                 300                 


Asp Gly Val Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln 
305                 310                 315                 320 


Tyr Asn Ser Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu His Gln 
                325                 330                 335     


Asp Trp Leu Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys Ala 
            340                 345                 350         


Leu Pro Ala Pro Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln Pro 
        355                 360                 365             


Arg Glu Pro Glu Val Tyr Thr Leu Pro Pro Ser Arg Glu Glu Met Thr 
    370                 375                 380                 


Lys Asn Gln Val Ser Leu Thr Cys Leu Val Lys Gly Phe Tyr Pro Ser 
385                 390                 395                 400 


Asp Ile Ala Val Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr 
                405                 410                 415     


Lys Thr Thr Pro Pro Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Thr 
            420                 425                 430         


Ser Lys Leu Thr Val Asp Lys Ser Arg Trp Gln Gln Gly Asn Val Phe 
        435                 440                 445             


Ser Cys Ser Val Met His Glu Ala Leu His Asn His Tyr Thr Gln Lys 
    450                 455                 460                 


Ser Leu Ser Leu Ser Pro Gly Lys 
465                 470         


<210>  96
<211>  485
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 1 sequence of BCMA/CD3 TsAb in TriSpecific-V2 
       format

<400>  96

Gln Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Ala Gly Gly 
1               5                   10                  15      


Ser Leu Arg Leu Ser Cys Thr Ala Ser Gly Arg Thr Phe Gly Trp Tyr 
            20                  25                  30          


Thr Met Gly Trp Phe Arg Gln Gly Pro Gly Lys Glu Arg Glu Phe Val 
        35                  40                  45              


Ala Ala Ile Ser Pro Ser Gly Gly Ala Thr Tyr Tyr Ala Asp Ser Val 
    50                  55                  60                  


Lys Gly Arg Phe Thr Ile Ser Arg Asp Tyr Ala Lys Asn Ala Val Tyr 
65                  70                  75                  80  


Leu Gln Met Asn Ser Leu Lys Pro Glu Asp Thr Ala Val Tyr Tyr Cys 
                85                  90                  95      


Asn Ala Arg Leu Trp Gly Leu Gly Ile Arg Asn Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Leu Val Thr Val Ser Ser Gly Gly Gly Gly Ser Gly Gly Gly Gly 
        115                 120                 125             


Ser Gln Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Ala Gly 
    130                 135                 140                 


Gly Ser Leu Arg Leu Ser Cys Ala Ser Ser Gly Arg Leu Phe Arg Tyr 
145                 150                 155                 160 


Thr Asp Met Ala Trp Tyr Arg Gln Ala Pro Gly Lys Gln Arg Glu Leu 
                165                 170                 175     


Val Ala Phe Ser Tyr Val Ser Gly Arg Thr Asn Tyr Ala Asp Ser Val 
            180                 185                 190         


Lys Gly Arg Phe Thr Ile Ser Arg Asp Asn Val Lys Lys Val Val Tyr 
        195                 200                 205             


Leu Gln Met Ser Ser Leu Thr Pro Glu Asp Thr Ala Val Tyr Tyr Cys 
    210                 215                 220                 


Ala Gln Gly Arg Ser Pro Tyr Arg Trp Gly Ser Tyr Ser Ser Met Phe 
225                 230                 235                 240 


Gly Ser Trp Gly Gln Gly Thr Leu Val Thr Val Ser Ser Glu Pro Lys 
                245                 250                 255     


Ser Cys Asp Lys Thr His Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu 
            260                 265                 270         


Leu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr 
        275                 280                 285             


Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val 
    290                 295                 300                 


Ser His Glu Asp Pro Glu Val Lys Phe Asn Trp Tyr Val Asp Gly Val 
305                 310                 315                 320 


Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser 
                325                 330                 335     


Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu His Gln Asp Trp Leu 
            340                 345                 350         


Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu Pro Ala 
        355                 360                 365             


Pro Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro 
    370                 375                 380                 


Gln Val Tyr Thr Leu Pro Pro Tyr Arg Glu Glu Met Thr Lys Asn Gln 
385                 390                 395                 400 


Val Ser Leu Tyr Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala 
                405                 410                 415     


Val Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr 
            420                 425                 430         


Pro Pro Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Tyr Ser Lys Leu 
        435                 440                 445             


Thr Val Asp Lys Ser Arg Trp Gln Gln Gly Asn Val Phe Ser Cys Ser 
    450                 455                 460                 


Val Met His Glu Ala Leu His Asn His Tyr Thr Gln Lys Ser Leu Ser 
465                 470                 475                 480 


Leu Ser Pro Gly Lys 
                485 


<210>  97
<211>  490
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 1 sequence of BCMA/CD3 TsAb in TriSpecific-V2 
       format

<400>  97

Gln Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Ala Gly Gly 
1               5                   10                  15      


Ser Leu Arg Leu Ser Cys Thr Ala Ser Gly Arg Thr Phe Gly Trp Tyr 
            20                  25                  30          


Thr Met Gly Trp Phe Arg Gln Gly Pro Gly Lys Glu Arg Glu Phe Val 
        35                  40                  45              


Ala Ala Ile Ser Pro Ser Gly Gly Ala Thr Tyr Tyr Ala Asp Ser Val 
    50                  55                  60                  


Lys Gly Arg Phe Thr Ile Ser Arg Asp Tyr Ala Lys Asn Ala Val Tyr 
65                  70                  75                  80  


Leu Gln Met Asn Ser Leu Lys Pro Glu Asp Thr Ala Val Tyr Tyr Cys 
                85                  90                  95      


Asn Ala Arg Leu Trp Gly Leu Gly Ile Arg Asn Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Leu Val Thr Val Ser Ser Gly Gly Gly Gly Ser Gly Gly Gly Gly 
        115                 120                 125             


Ser Gly Gly Gly Gly Ser Gln Val Gln Leu Val Glu Ser Gly Gly Gly 
    130                 135                 140                 


Leu Val Gln Ala Gly Gly Ser Leu Arg Leu Ser Cys Ala Ser Ser Gly 
145                 150                 155                 160 


Arg Leu Phe Arg Tyr Thr Asp Met Ala Trp Tyr Arg Gln Ala Pro Gly 
                165                 170                 175     


Lys Gln Arg Glu Leu Val Ala Phe Ser Tyr Val Ser Gly Arg Thr Asn 
            180                 185                 190         


Tyr Ala Asp Ser Val Lys Gly Arg Phe Thr Ile Ser Arg Asp Asn Val 
        195                 200                 205             


Lys Lys Val Val Tyr Leu Gln Met Ser Ser Leu Thr Pro Glu Asp Thr 
    210                 215                 220                 


Ala Val Tyr Tyr Cys Ala Gln Gly Arg Ser Pro Tyr Arg Trp Gly Ser 
225                 230                 235                 240 


Tyr Ser Ser Met Phe Gly Ser Trp Gly Gln Gly Thr Leu Val Thr Val 
                245                 250                 255     


Ser Ser Gly Gly Gly Gly Ser Asp Lys Thr His Thr Cys Pro Pro Cys 
            260                 265                 270         


Pro Ala Pro Glu Leu Leu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro 
        275                 280                 285             


Lys Pro Lys Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys 
    290                 295                 300                 


Val Val Val Asp Val Ser His Glu Asp Pro Glu Val Lys Phe Asn Trp 
305                 310                 315                 320 


Tyr Val Asp Gly Val Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu 
                325                 330                 335     


Glu Gln Tyr Asn Ser Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu 
            340                 345                 350         


His Gln Asp Trp Leu Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn 
        355                 360                 365             


Lys Ala Leu Pro Ala Pro Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly 
    370                 375                 380                 


Gln Pro Arg Glu Pro Gln Val Tyr Thr Leu Pro Pro Tyr Arg Glu Glu 
385                 390                 395                 400 


Met Thr Lys Asn Gln Val Ser Leu Tyr Cys Leu Val Lys Gly Phe Tyr 
                405                 410                 415     


Pro Ser Asp Ile Ala Val Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn 
            420                 425                 430         


Asn Tyr Lys Thr Thr Pro Pro Val Leu Asp Ser Asp Gly Ser Phe Phe 
        435                 440                 445             


Leu Tyr Ser Lys Leu Thr Val Asp Lys Ser Arg Trp Gln Gln Gly Asn 
    450                 455                 460                 


Val Phe Ser Cys Ser Val Met His Glu Ala Leu His Asn His Tyr Thr 
465                 470                 475                 480 


Gln Lys Ser Leu Ser Leu Ser Pro Gly Lys 
                485                 490 


<210>  98
<211>  472
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 2 sequence of BCMA/CD3 TsAb in TriSpecific-V2 
       format

<400>  98

Gln Val Gln Leu Gln Gln Ser Gly Ala Glu Leu Ala Arg Pro Gly Ala 
1               5                   10                  15      


Ser Val Lys Met Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Ser Tyr 
            20                  25                  30          


Thr Met His Trp Val Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile 
        35                  40                  45              


Gly Tyr Ile Asn Pro Ser Ser Gly Tyr Thr Lys Tyr Asn Gln Lys Phe 
    50                  55                  60                  


Lys Asp Lys Ala Thr Leu Thr Ala Asp Lys Ser Ser Ser Thr Ala Tyr 
65                  70                  75                  80  


Met Gln Leu Ser Ser Leu Thr Ser Glu Asp Ser Ala Val Tyr Tyr Cys 
                85                  90                  95      


Ala Arg Trp Gln Asp Tyr Asp Val Tyr Phe Asp Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Thr Leu Thr Val Ser Ser Gly Gly Gly Gly Ser Gly Gly Gly Gly 
        115                 120                 125             


Ser Gly Gly Gly Gly Ser Gln Ile Val Leu Ser Gln Ser Pro Ala Ile 
    130                 135                 140                 


Leu Ser Ala Ser Pro Gly Glu Lys Val Thr Met Thr Cys Arg Ala Ser 
145                 150                 155                 160 


Ser Ser Val Ser Tyr Met His Trp Tyr Gln Gln Lys Pro Gly Ser Ser 
                165                 170                 175     


Pro Lys Pro Trp Ile Tyr Ala Ala Ser Asn Arg Ala Ser Gly Val Pro 
            180                 185                 190         


Ala Arg Phe Ser Gly Ser Gly Ser Gly Thr Ser Tyr Ser Leu Thr Ile 
        195                 200                 205             


Ser Arg Val Glu Ala Glu Asp Ala Ala Thr Tyr Tyr Cys Gln Gln Trp 
    210                 215                 220                 


Ser Ser Asn Pro Pro Thr Phe Gly Gly Gly Thr Lys Leu Glu Thr Lys 
225                 230                 235                 240 


Gly Gly Gly Gly Ser Asp Lys Thr His Thr Cys Pro Pro Cys Pro Ala 
                245                 250                 255     


Pro Glu Leu Leu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro Lys Pro 
            260                 265                 270         


Lys Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val 
        275                 280                 285             


Val Asp Val Ser His Glu Asp Pro Glu Val Lys Phe Asn Trp Tyr Val 
    290                 295                 300                 


Asp Gly Val Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln 
305                 310                 315                 320 


Tyr Asn Ser Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu His Gln 
                325                 330                 335     


Asp Trp Leu Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys Ala 
            340                 345                 350         


Leu Pro Ala Pro Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln Pro 
        355                 360                 365             


Arg Glu Pro Glu Val Tyr Thr Leu Pro Pro Ser Arg Glu Glu Met Thr 
    370                 375                 380                 


Lys Asn Gln Val Ser Leu Thr Cys Leu Val Lys Gly Phe Tyr Pro Ser 
385                 390                 395                 400 


Asp Ile Ala Val Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr 
                405                 410                 415     


Lys Thr Thr Pro Pro Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Thr 
            420                 425                 430         


Ser Lys Leu Thr Val Asp Lys Ser Arg Trp Gln Gln Gly Asn Val Phe 
        435                 440                 445             


Ser Cys Ser Val Met His Glu Ala Leu His Asn His Tyr Thr Gln Lys 
    450                 455                 460                 


Ser Leu Ser Leu Ser Pro Gly Lys 
465                 470         


<210>  99
<211>  472
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 2 sequence of BCMA/CD3 TsAb in TriSpecific-V2 
       format

<400>  99

Gln Val Gln Leu Gln Gln Ser Gly Ala Glu Leu Ala Arg Pro Gly Ala 
1               5                   10                  15      


Ser Val Lys Met Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Ser Tyr 
            20                  25                  30          


Thr Met His Trp Val Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile 
        35                  40                  45              


Gly Tyr Ile Asn Pro Ser Ser Gly Tyr Thr Lys Tyr Asn Gln Lys Phe 
    50                  55                  60                  


Lys Asp Lys Ala Thr Leu Thr Ala Asp Lys Ser Ser Ser Thr Ala Tyr 
65                  70                  75                  80  


Met Gln Leu Ser Ser Leu Thr Ser Glu Asp Ser Ala Val Tyr Tyr Cys 
                85                  90                  95      


Ala Arg Trp Gln Asp Tyr Asp Val Tyr Phe Asp Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Thr Leu Thr Val Ser Ser Gly Gly Gly Gly Ser Gly Gly Gly Gly 
        115                 120                 125             


Ser Gly Gly Gly Gly Ser Gln Ile Val Leu Ser Gln Ser Pro Ala Ile 
    130                 135                 140                 


Leu Ser Ala Ser Pro Gly Glu Lys Val Thr Met Thr Cys Arg Ala Ser 
145                 150                 155                 160 


Ser Ser Val Ser Tyr Met His Trp Tyr Gln Gln Lys Pro Gly Ser Ser 
                165                 170                 175     


Pro Lys Pro Trp Ile Tyr Ala Ala Ser Asn Arg Ala Ser Gly Val Pro 
            180                 185                 190         


Ala Arg Phe Ser Gly Ser Gly Ser Gly Thr Ser Tyr Ser Leu Thr Ile 
        195                 200                 205             


Ser Arg Val Glu Ala Glu Asp Ala Ala Thr Tyr Tyr Cys Gln Gln Trp 
    210                 215                 220                 


Ser Ser Asn Pro Pro Thr Phe Gly Gly Gly Thr Lys Leu Glu Thr Lys 
225                 230                 235                 240 


Glu Pro Lys Ser Cys Asp Lys Thr His Thr Cys Pro Pro Cys Pro Ala 
                245                 250                 255     


Pro Glu Leu Leu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro Lys Pro 
            260                 265                 270         


Lys Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val 
        275                 280                 285             


Val Asp Val Ser His Glu Asp Pro Glu Val Lys Phe Asn Trp Tyr Val 
    290                 295                 300                 


Asp Gly Val Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln 
305                 310                 315                 320 


Tyr Asn Ser Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu His Gln 
                325                 330                 335     


Asp Trp Leu Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys Ala 
            340                 345                 350         


Leu Pro Ala Pro Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln Pro 
        355                 360                 365             


Arg Glu Pro Glu Val Tyr Thr Leu Pro Pro Ser Arg Glu Glu Met Thr 
    370                 375                 380                 


Lys Asn Gln Val Ser Leu Thr Cys Leu Val Lys Gly Phe Tyr Pro Ser 
385                 390                 395                 400 


Asp Ile Ala Val Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr 
                405                 410                 415     


Lys Thr Thr Pro Pro Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Thr 
            420                 425                 430         


Ser Lys Leu Thr Val Asp Lys Ser Arg Trp Gln Gln Gly Asn Val Phe 
        435                 440                 445             


Ser Cys Ser Val Met His Glu Ala Leu His Asn His Tyr Thr Gln Lys 
    450                 455                 460                 


Ser Leu Ser Leu Ser Pro Gly Lys 
465                 470         


<210>  100
<211>  588
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 1 sequence of BCMA/CD3 BsAb in BiSpecific-V3 
       format

<400>  100

Gln Val Gln Leu Gln Gln Ser Gly Ala Glu Leu Ala Arg Pro Gly Ala 
1               5                   10                  15      


Ser Val Lys Met Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Ser Tyr 
            20                  25                  30          


Thr Met His Trp Val Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile 
        35                  40                  45              


Gly Tyr Ile Asn Pro Ser Ser Gly Tyr Thr Lys Tyr Asn Gln Lys Phe 
    50                  55                  60                  


Lys Asp Lys Ala Thr Leu Thr Ala Asp Lys Ser Ser Ser Thr Ala Tyr 
65                  70                  75                  80  


Met Gln Leu Ser Ser Leu Thr Ser Glu Asp Ser Ala Val Tyr Tyr Cys 
                85                  90                  95      


Ala Arg Trp Gln Asp Tyr Asp Val Tyr Phe Asp Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Thr Leu Thr Val Ser Ser Ala Ser Thr Lys Gly Pro Ser Val Phe 
        115                 120                 125             


Pro Leu Ala Pro Ser Ser Lys Ser Thr Ser Gly Gly Thr Ala Ala Leu 
    130                 135                 140                 


Gly Cys Leu Val Lys Asp Tyr Phe Pro Glu Pro Val Thr Val Ser Trp 
145                 150                 155                 160 


Asn Ser Gly Ala Leu Thr Ser Gly Val His Thr Phe Pro Ala Val Leu 
                165                 170                 175     


Gln Ser Ser Gly Leu Tyr Ser Leu Ser Ser Val Val Thr Val Pro Ser 
            180                 185                 190         


Ser Ser Leu Gly Thr Gln Thr Tyr Ile Cys Asn Val Asn His Lys Pro 
        195                 200                 205             


Ser Asn Thr Lys Val Asp Lys Lys Val Glu Pro Lys Ser Cys Asp Lys 
    210                 215                 220                 


Thr His Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu Leu Gly Gly Pro 
225                 230                 235                 240 


Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu Met Ile Ser 
                245                 250                 255     


Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val Ser His Glu Asp 
            260                 265                 270         


Pro Glu Val Lys Phe Asn Trp Tyr Val Asp Gly Val Glu Val His Asn 
        275                 280                 285             


Ala Lys Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr Tyr Arg Val 
    290                 295                 300                 


Val Ser Val Leu Thr Val Leu His Gln Asp Trp Leu Asn Gly Lys Glu 
305                 310                 315                 320 


Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu Pro Ala Pro Ile Glu Lys 
                325                 330                 335     


Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Gln Val Tyr Thr 
            340                 345                 350         


Leu Pro Pro Ser Arg Asp Glu Leu Thr Lys Asn Gln Val Ser Leu Thr 
        355                 360                 365             


Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val Glu Trp Glu 
    370                 375                 380                 


Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr Pro Pro Val Leu 
385                 390                 395                 400 


Asp Ser Asp Gly Ser Phe Phe Leu Tyr Ser Lys Leu Thr Val Asp Lys 
                405                 410                 415     


Ser Arg Trp Gln Gln Gly Asn Val Phe Ser Cys Ser Val Met His Glu 
            420                 425                 430         


Ala Leu His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu Ser Pro Gly 
        435                 440                 445             


Lys Gly Gly Gly Gly Ser Gly Gly Gly Gly Ser Gly Gly Gly Gly Ser 
    450                 455                 460                 


Gln Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Ala Gly Gly 
465                 470                 475                 480 


Ser Leu Arg Leu Ser Cys Ala Ser Ser Gly Arg Leu Phe Arg Tyr Thr 
                485                 490                 495     


Asp Met Ala Trp Tyr Arg Gln Ala Pro Gly Lys Gln Arg Glu Leu Val 
            500                 505                 510         


Ala Phe Ser Tyr Val Ser Gly Arg Thr Asn Tyr Ala Asp Ser Val Lys 
        515                 520                 525             


Gly Arg Phe Thr Ile Ser Arg Asp Asn Val Lys Lys Val Val Tyr Leu 
    530                 535                 540                 


Gln Met Ser Ser Leu Thr Pro Glu Asp Thr Ala Val Tyr Tyr Cys Ala 
545                 550                 555                 560 


Gln Gly Arg Ser Pro Tyr Arg Trp Gly Ser Tyr Ser Ser Met Phe Gly 
                565                 570                 575     


Ser Trp Gly Gln Gly Thr Leu Val Thr Val Ser Ser 
            580                 585             


<210>  101
<211>  583
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 1 sequence of BCMA/CD3 BsAb in BiSpecific-V3 
       format

<400>  101

Gln Val Gln Leu Gln Gln Ser Gly Ala Glu Leu Ala Arg Pro Gly Ala 
1               5                   10                  15      


Ser Val Lys Met Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Ser Tyr 
            20                  25                  30          


Thr Met His Trp Val Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile 
        35                  40                  45              


Gly Tyr Ile Asn Pro Ser Ser Gly Tyr Thr Lys Tyr Asn Gln Lys Phe 
    50                  55                  60                  


Lys Asp Lys Ala Thr Leu Thr Ala Asp Lys Ser Ser Ser Thr Ala Tyr 
65                  70                  75                  80  


Met Gln Leu Ser Ser Leu Thr Ser Glu Asp Ser Ala Val Tyr Tyr Cys 
                85                  90                  95      


Ala Arg Trp Gln Asp Tyr Asp Val Tyr Phe Asp Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Thr Leu Thr Val Ser Ser Ala Ser Thr Lys Gly Pro Ser Val Phe 
        115                 120                 125             


Pro Leu Ala Pro Ser Ser Lys Ser Thr Ser Gly Gly Thr Ala Ala Leu 
    130                 135                 140                 


Gly Cys Leu Val Lys Asp Tyr Phe Pro Glu Pro Val Thr Val Ser Trp 
145                 150                 155                 160 


Asn Ser Gly Ala Leu Thr Ser Gly Val His Thr Phe Pro Ala Val Leu 
                165                 170                 175     


Gln Ser Ser Gly Leu Tyr Ser Leu Ser Ser Val Val Thr Val Pro Ser 
            180                 185                 190         


Ser Ser Leu Gly Thr Gln Thr Tyr Ile Cys Asn Val Asn His Lys Pro 
        195                 200                 205             


Ser Asn Thr Lys Val Asp Lys Lys Val Gly Gly Gly Gly Ser Asp Lys 
    210                 215                 220                 


Thr His Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu Leu Gly Gly Pro 
225                 230                 235                 240 


Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu Met Ile Ser 
                245                 250                 255     


Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val Ser His Glu Asp 
            260                 265                 270         


Pro Glu Val Lys Phe Asn Trp Tyr Val Asp Gly Val Glu Val His Asn 
        275                 280                 285             


Ala Lys Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr Tyr Arg Val 
    290                 295                 300                 


Val Ser Val Leu Thr Val Leu His Gln Asp Trp Leu Asn Gly Lys Glu 
305                 310                 315                 320 


Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu Pro Ala Pro Ile Glu Lys 
                325                 330                 335     


Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Gln Val Tyr Thr 
            340                 345                 350         


Leu Pro Pro Ser Arg Asp Glu Leu Thr Lys Asn Gln Val Ser Leu Thr 
        355                 360                 365             


Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val Glu Trp Glu 
    370                 375                 380                 


Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr Pro Pro Val Leu 
385                 390                 395                 400 


Asp Ser Asp Gly Ser Phe Phe Leu Tyr Ser Lys Leu Thr Val Asp Lys 
                405                 410                 415     


Ser Arg Trp Gln Gln Gly Asn Val Phe Ser Cys Ser Val Met His Glu 
            420                 425                 430         


Ala Leu His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu Ser Pro Gly 
        435                 440                 445             


Lys Gly Gly Gly Gly Ser Gly Gly Gly Gly Ser Gln Val Gln Leu Val 
    450                 455                 460                 


Glu Ser Gly Gly Gly Leu Val Gln Ala Gly Gly Ser Leu Arg Leu Ser 
465                 470                 475                 480 


Cys Ala Ser Ser Gly Arg Leu Phe Arg Tyr Thr Asp Met Ala Trp Tyr 
                485                 490                 495     


Arg Gln Ala Pro Gly Lys Gln Arg Glu Leu Val Ala Phe Ser Tyr Val 
            500                 505                 510         


Ser Gly Arg Thr Asn Tyr Ala Asp Ser Val Lys Gly Arg Phe Thr Ile 
        515                 520                 525             


Ser Arg Asp Asn Val Lys Lys Val Val Tyr Leu Gln Met Ser Ser Leu 
    530                 535                 540                 


Thr Pro Glu Asp Thr Ala Val Tyr Tyr Cys Ala Gln Gly Arg Ser Pro 
545                 550                 555                 560 


Tyr Arg Trp Gly Ser Tyr Ser Ser Met Phe Gly Ser Trp Gly Gln Gly 
                565                 570                 575     


Thr Leu Val Thr Val Ser Ser 
            580             


<210>  102
<211>  213
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 2 sequence of BCMA/CD3 BsAb in BiSpecific-V3 
       format

<400>  102

Gln Ile Val Leu Ser Gln Ser Pro Ala Ile Leu Ser Ala Ser Pro Gly 
1               5                   10                  15      


Glu Lys Val Thr Met Thr Cys Arg Ala Ser Ser Ser Val Ser Tyr Met 
            20                  25                  30          


His Trp Tyr Gln Gln Lys Pro Gly Ser Ser Pro Lys Pro Trp Ile Tyr 
        35                  40                  45              


Ala Ala Ser Asn Arg Ala Ser Gly Val Pro Ala Arg Phe Ser Gly Ser 
    50                  55                  60                  


Gly Ser Gly Thr Ser Tyr Ser Leu Thr Ile Ser Arg Val Glu Ala Glu 
65                  70                  75                  80  


Asp Ala Ala Thr Tyr Tyr Cys Gln Gln Trp Ser Ser Asn Pro Pro Thr 
                85                  90                  95      


Phe Gly Gly Gly Thr Lys Leu Glu Thr Lys Arg Thr Val Ala Ala Pro 
            100                 105                 110         


Ser Val Phe Ile Phe Pro Pro Ser Asp Glu Gln Leu Lys Ser Gly Thr 
        115                 120                 125             


Ala Ser Val Val Cys Leu Leu Asn Asn Phe Tyr Pro Arg Glu Ala Lys 
    130                 135                 140                 


Val Gln Trp Lys Val Asp Asn Ala Leu Gln Ser Gly Asn Ser Gln Glu 
145                 150                 155                 160 


Ser Val Thr Glu Gln Asp Ser Lys Asp Ser Thr Tyr Ser Leu Ser Ser 
                165                 170                 175     


Thr Leu Thr Leu Ser Lys Ala Asp Tyr Glu Lys His Lys Val Tyr Ala 
            180                 185                 190         


Cys Glu Val Thr His Gln Gly Leu Ser Ser Pro Val Thr Lys Ser Phe 
        195                 200                 205             


Asn Arg Gly Glu Cys 
    210             


<210>  103
<211>  588
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 1 sequence of BCMA/CD3 TsAb in TriSpecific-V3 
       format

<400>  103

Gln Val Gln Leu Gln Gln Ser Gly Ala Glu Leu Ala Arg Pro Gly Ala 
1               5                   10                  15      


Ser Val Lys Met Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Ser Tyr 
            20                  25                  30          


Thr Met His Trp Val Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile 
        35                  40                  45              


Gly Tyr Ile Asn Pro Ser Ser Gly Tyr Thr Lys Tyr Asn Gln Lys Phe 
    50                  55                  60                  


Lys Asp Lys Ala Thr Leu Thr Ala Asp Lys Ser Ser Ser Thr Ala Tyr 
65                  70                  75                  80  


Met Gln Leu Ser Ser Leu Thr Ser Glu Asp Ser Ala Val Tyr Tyr Cys 
                85                  90                  95      


Ala Arg Trp Gln Asp Tyr Asp Val Tyr Phe Asp Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Thr Leu Thr Val Ser Ser Ala Ser Thr Lys Gly Pro Ser Val Phe 
        115                 120                 125             


Pro Leu Ala Pro Ser Ser Lys Ser Thr Ser Gly Gly Thr Ala Ala Leu 
    130                 135                 140                 


Gly Cys Leu Val Lys Asp Tyr Phe Pro Glu Pro Val Thr Val Ser Trp 
145                 150                 155                 160 


Asn Ser Gly Ala Leu Thr Ser Gly Val His Thr Phe Pro Ala Val Leu 
                165                 170                 175     


Gln Ser Ser Gly Leu Tyr Ser Leu Ser Ser Val Val Thr Val Pro Ser 
            180                 185                 190         


Ser Ser Leu Gly Thr Gln Thr Tyr Ile Cys Asn Val Asn His Lys Pro 
        195                 200                 205             


Ser Asn Thr Lys Val Asp Lys Lys Val Glu Pro Lys Ser Cys Asp Lys 
    210                 215                 220                 


Thr His Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu Leu Gly Gly Pro 
225                 230                 235                 240 


Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu Met Ile Ser 
                245                 250                 255     


Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val Ser His Glu Asp 
            260                 265                 270         


Pro Glu Val Lys Phe Asn Trp Tyr Val Asp Gly Val Glu Val His Asn 
        275                 280                 285             


Ala Lys Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr Tyr Arg Val 
    290                 295                 300                 


Val Ser Val Leu Thr Val Leu His Gln Asp Trp Leu Asn Gly Lys Glu 
305                 310                 315                 320 


Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu Pro Ala Pro Ile Glu Lys 
                325                 330                 335     


Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Gln Val Tyr Thr 
            340                 345                 350         


Leu Pro Pro Tyr Arg Glu Glu Met Thr Lys Asn Gln Val Ser Leu Tyr 
        355                 360                 365             


Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val Glu Trp Glu 
    370                 375                 380                 


Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr Pro Pro Val Leu 
385                 390                 395                 400 


Asp Ser Asp Gly Ser Phe Phe Leu Tyr Ser Lys Leu Thr Val Asp Lys 
                405                 410                 415     


Ser Arg Trp Gln Gln Gly Asn Val Phe Ser Cys Ser Val Met His Glu 
            420                 425                 430         


Ala Leu His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu Ser Pro Gly 
        435                 440                 445             


Lys Gly Gly Gly Gly Ser Gly Gly Gly Gly Ser Gly Gly Gly Gly Ser 
    450                 455                 460                 


Gln Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Ala Gly Gly 
465                 470                 475                 480 


Ser Leu Arg Leu Ser Cys Ala Ser Ser Gly Arg Leu Phe Arg Tyr Thr 
                485                 490                 495     


Asp Met Ala Trp Tyr Arg Gln Ala Pro Gly Lys Gln Arg Glu Leu Val 
            500                 505                 510         


Ala Phe Ser Tyr Val Ser Gly Arg Thr Asn Tyr Ala Asp Ser Val Lys 
        515                 520                 525             


Gly Arg Phe Thr Ile Ser Arg Asp Asn Val Lys Lys Val Val Tyr Leu 
    530                 535                 540                 


Gln Met Ser Ser Leu Thr Pro Glu Asp Thr Ala Val Tyr Tyr Cys Ala 
545                 550                 555                 560 


Gln Gly Arg Ser Pro Tyr Arg Trp Gly Ser Tyr Ser Ser Met Phe Gly 
                565                 570                 575     


Ser Trp Gly Gln Gly Thr Leu Val Thr Val Ser Ser 
            580                 585             


<210>  104
<211>  583
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 1 sequence of BCMA/CD3 TsAb in TriSpecific-V3 
       format

<400>  104

Gln Val Gln Leu Gln Gln Ser Gly Ala Glu Leu Ala Arg Pro Gly Ala 
1               5                   10                  15      


Ser Val Lys Met Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Ser Tyr 
            20                  25                  30          


Thr Met His Trp Val Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile 
        35                  40                  45              


Gly Tyr Ile Asn Pro Ser Ser Gly Tyr Thr Lys Tyr Asn Gln Lys Phe 
    50                  55                  60                  


Lys Asp Lys Ala Thr Leu Thr Ala Asp Lys Ser Ser Ser Thr Ala Tyr 
65                  70                  75                  80  


Met Gln Leu Ser Ser Leu Thr Ser Glu Asp Ser Ala Val Tyr Tyr Cys 
                85                  90                  95      


Ala Arg Trp Gln Asp Tyr Asp Val Tyr Phe Asp Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Thr Leu Thr Val Ser Ser Ala Ser Thr Lys Gly Pro Ser Val Phe 
        115                 120                 125             


Pro Leu Ala Pro Ser Ser Lys Ser Thr Ser Gly Gly Thr Ala Ala Leu 
    130                 135                 140                 


Gly Cys Leu Val Lys Asp Tyr Phe Pro Glu Pro Val Thr Val Ser Trp 
145                 150                 155                 160 


Asn Ser Gly Ala Leu Thr Ser Gly Val His Thr Phe Pro Ala Val Leu 
                165                 170                 175     


Gln Ser Ser Gly Leu Tyr Ser Leu Ser Ser Val Val Thr Val Pro Ser 
            180                 185                 190         


Ser Ser Leu Gly Thr Gln Thr Tyr Ile Cys Asn Val Asn His Lys Pro 
        195                 200                 205             


Ser Asn Thr Lys Val Asp Lys Lys Val Gly Gly Gly Gly Ser Asp Lys 
    210                 215                 220                 


Thr His Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu Leu Gly Gly Pro 
225                 230                 235                 240 


Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu Met Ile Ser 
                245                 250                 255     


Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val Ser His Glu Asp 
            260                 265                 270         


Pro Glu Val Lys Phe Asn Trp Tyr Val Asp Gly Val Glu Val His Asn 
        275                 280                 285             


Ala Lys Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr Tyr Arg Val 
    290                 295                 300                 


Val Ser Val Leu Thr Val Leu His Gln Asp Trp Leu Asn Gly Lys Glu 
305                 310                 315                 320 


Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu Pro Ala Pro Ile Glu Lys 
                325                 330                 335     


Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Gln Val Tyr Thr 
            340                 345                 350         


Leu Pro Pro Tyr Arg Glu Glu Met Thr Lys Asn Gln Val Ser Leu Tyr 
        355                 360                 365             


Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val Glu Trp Glu 
    370                 375                 380                 


Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr Pro Pro Val Leu 
385                 390                 395                 400 


Asp Ser Asp Gly Ser Phe Phe Leu Tyr Ser Lys Leu Thr Val Asp Lys 
                405                 410                 415     


Ser Arg Trp Gln Gln Gly Asn Val Phe Ser Cys Ser Val Met His Glu 
            420                 425                 430         


Ala Leu His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu Ser Pro Gly 
        435                 440                 445             


Lys Gly Gly Gly Gly Ser Gly Gly Gly Gly Ser Gln Val Gln Leu Val 
    450                 455                 460                 


Glu Ser Gly Gly Gly Leu Val Gln Ala Gly Gly Ser Leu Arg Leu Ser 
465                 470                 475                 480 


Cys Ala Ser Ser Gly Arg Leu Phe Arg Tyr Thr Asp Met Ala Trp Tyr 
                485                 490                 495     


Arg Gln Ala Pro Gly Lys Gln Arg Glu Leu Val Ala Phe Ser Tyr Val 
            500                 505                 510         


Ser Gly Arg Thr Asn Tyr Ala Asp Ser Val Lys Gly Arg Phe Thr Ile 
        515                 520                 525             


Ser Arg Asp Asn Val Lys Lys Val Val Tyr Leu Gln Met Ser Ser Leu 
    530                 535                 540                 


Thr Pro Glu Asp Thr Ala Val Tyr Tyr Cys Ala Gln Gly Arg Ser Pro 
545                 550                 555                 560 


Tyr Arg Trp Gly Ser Tyr Ser Ser Met Phe Gly Ser Trp Gly Gln Gly 
                565                 570                 575     


Thr Leu Val Thr Val Ser Ser 
            580             


<210>  105
<211>  583
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 2 sequence of BCMA/CD3 TsAb in TriSpecific-V3 
       format

<400>  105

Gln Val Gln Leu Gln Gln Ser Gly Ala Glu Leu Ala Arg Pro Gly Ala 
1               5                   10                  15      


Ser Val Lys Met Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Ser Tyr 
            20                  25                  30          


Thr Met His Trp Val Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile 
        35                  40                  45              


Gly Tyr Ile Asn Pro Ser Ser Gly Tyr Thr Lys Tyr Asn Gln Lys Phe 
    50                  55                  60                  


Lys Asp Lys Ala Thr Leu Thr Ala Asp Lys Ser Ser Ser Thr Ala Tyr 
65                  70                  75                  80  


Met Gln Leu Ser Ser Leu Thr Ser Glu Asp Ser Ala Val Tyr Tyr Cys 
                85                  90                  95      


Ala Arg Trp Gln Asp Tyr Asp Val Tyr Phe Asp Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Thr Leu Thr Val Ser Ser Ala Ser Thr Lys Gly Pro Ser Val Phe 
        115                 120                 125             


Pro Leu Ala Pro Ser Ser Lys Ser Thr Ser Gly Gly Thr Ala Ala Leu 
    130                 135                 140                 


Gly Cys Leu Val Lys Asp Tyr Phe Pro Glu Pro Val Thr Val Ser Trp 
145                 150                 155                 160 


Asn Ser Gly Ala Leu Thr Ser Gly Val His Thr Phe Pro Ala Val Leu 
                165                 170                 175     


Gln Ser Ser Gly Leu Tyr Ser Leu Ser Ser Val Val Thr Val Pro Ser 
            180                 185                 190         


Ser Ser Leu Gly Thr Gln Thr Tyr Ile Cys Asn Val Asn His Lys Pro 
        195                 200                 205             


Ser Asn Thr Lys Val Asp Lys Lys Val Glu Pro Lys Ser Cys Asp Lys 
    210                 215                 220                 


Thr His Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu Leu Gly Gly Pro 
225                 230                 235                 240 


Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu Met Ile Ser 
                245                 250                 255     


Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val Ser His Glu Asp 
            260                 265                 270         


Pro Glu Val Lys Phe Asn Trp Tyr Val Asp Gly Val Glu Val His Asn 
        275                 280                 285             


Ala Lys Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr Tyr Arg Val 
    290                 295                 300                 


Val Ser Val Leu Thr Val Leu His Gln Asp Trp Leu Asn Gly Lys Glu 
305                 310                 315                 320 


Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu Pro Ala Pro Ile Glu Lys 
                325                 330                 335     


Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Glu Val Tyr Thr 
            340                 345                 350         


Leu Pro Pro Ser Arg Glu Glu Met Thr Lys Asn Gln Val Ser Leu Thr 
        355                 360                 365             


Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val Glu Trp Glu 
    370                 375                 380                 


Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr Pro Pro Val Leu 
385                 390                 395                 400 


Asp Ser Asp Gly Ser Phe Phe Leu Thr Ser Lys Leu Thr Val Asp Lys 
                405                 410                 415     


Ser Arg Trp Gln Gln Gly Asn Val Phe Ser Cys Ser Val Met His Glu 
            420                 425                 430         


Ala Leu His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu Ser Pro Gly 
        435                 440                 445             


Lys Gly Gly Gly Gly Ser Gly Gly Gly Gly Ser Gly Gly Gly Gly Ser 
    450                 455                 460                 


Gln Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Ala Gly Gly 
465                 470                 475                 480 


Ser Leu Arg Leu Ser Cys Thr Ala Ser Gly Arg Thr Phe Gly Trp Tyr 
                485                 490                 495     


Thr Met Gly Trp Phe Arg Gln Gly Pro Gly Lys Glu Arg Glu Phe Val 
            500                 505                 510         


Ala Ala Ile Ser Pro Ser Gly Gly Ala Thr Tyr Tyr Ala Asp Ser Val 
        515                 520                 525             


Lys Gly Arg Phe Thr Ile Ser Arg Asp Tyr Ala Lys Asn Ala Val Tyr 
    530                 535                 540                 


Leu Gln Met Asn Ser Leu Lys Pro Glu Asp Thr Ala Val Tyr Tyr Cys 
545                 550                 555                 560 


Asn Ala Arg Leu Trp Gly Leu Gly Ile Arg Asn Tyr Trp Gly Gln Gly 
                565                 570                 575     


Thr Leu Val Thr Val Ser Ser 
            580             


<210>  106
<211>  578
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 2 sequence of BCMA/CD3 TsAb in TriSpecific-V3 
       format

<400>  106

Gln Val Gln Leu Gln Gln Ser Gly Ala Glu Leu Ala Arg Pro Gly Ala 
1               5                   10                  15      


Ser Val Lys Met Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Ser Tyr 
            20                  25                  30          


Thr Met His Trp Val Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile 
        35                  40                  45              


Gly Tyr Ile Asn Pro Ser Ser Gly Tyr Thr Lys Tyr Asn Gln Lys Phe 
    50                  55                  60                  


Lys Asp Lys Ala Thr Leu Thr Ala Asp Lys Ser Ser Ser Thr Ala Tyr 
65                  70                  75                  80  


Met Gln Leu Ser Ser Leu Thr Ser Glu Asp Ser Ala Val Tyr Tyr Cys 
                85                  90                  95      


Ala Arg Trp Gln Asp Tyr Asp Val Tyr Phe Asp Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Thr Leu Thr Val Ser Ser Ala Ser Thr Lys Gly Pro Ser Val Phe 
        115                 120                 125             


Pro Leu Ala Pro Ser Ser Lys Ser Thr Ser Gly Gly Thr Ala Ala Leu 
    130                 135                 140                 


Gly Cys Leu Val Lys Asp Tyr Phe Pro Glu Pro Val Thr Val Ser Trp 
145                 150                 155                 160 


Asn Ser Gly Ala Leu Thr Ser Gly Val His Thr Phe Pro Ala Val Leu 
                165                 170                 175     


Gln Ser Ser Gly Leu Tyr Ser Leu Ser Ser Val Val Thr Val Pro Ser 
            180                 185                 190         


Ser Ser Leu Gly Thr Gln Thr Tyr Ile Cys Asn Val Asn His Lys Pro 
        195                 200                 205             


Ser Asn Thr Lys Val Asp Lys Lys Val Gly Gly Gly Gly Ser Asp Lys 
    210                 215                 220                 


Thr His Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu Leu Gly Gly Pro 
225                 230                 235                 240 


Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu Met Ile Ser 
                245                 250                 255     


Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val Ser His Glu Asp 
            260                 265                 270         


Pro Glu Val Lys Phe Asn Trp Tyr Val Asp Gly Val Glu Val His Asn 
        275                 280                 285             


Ala Lys Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr Tyr Arg Val 
    290                 295                 300                 


Val Ser Val Leu Thr Val Leu His Gln Asp Trp Leu Asn Gly Lys Glu 
305                 310                 315                 320 


Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu Pro Ala Pro Ile Glu Lys 
                325                 330                 335     


Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Glu Val Tyr Thr 
            340                 345                 350         


Leu Pro Pro Ser Arg Glu Glu Met Thr Lys Asn Gln Val Ser Leu Thr 
        355                 360                 365             


Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val Glu Trp Glu 
    370                 375                 380                 


Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr Pro Pro Val Leu 
385                 390                 395                 400 


Asp Ser Asp Gly Ser Phe Phe Leu Thr Ser Lys Leu Thr Val Asp Lys 
                405                 410                 415     


Ser Arg Trp Gln Gln Gly Asn Val Phe Ser Cys Ser Val Met His Glu 
            420                 425                 430         


Ala Leu His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu Ser Pro Gly 
        435                 440                 445             


Lys Gly Gly Gly Gly Ser Gly Gly Gly Gly Ser Gln Val Gln Leu Val 
    450                 455                 460                 


Glu Ser Gly Gly Gly Leu Val Gln Ala Gly Gly Ser Leu Arg Leu Ser 
465                 470                 475                 480 


Cys Thr Ala Ser Gly Arg Thr Phe Gly Trp Tyr Thr Met Gly Trp Phe 
                485                 490                 495     


Arg Gln Gly Pro Gly Lys Glu Arg Glu Phe Val Ala Ala Ile Ser Pro 
            500                 505                 510         


Ser Gly Gly Ala Thr Tyr Tyr Ala Asp Ser Val Lys Gly Arg Phe Thr 
        515                 520                 525             


Ile Ser Arg Asp Tyr Ala Lys Asn Ala Val Tyr Leu Gln Met Asn Ser 
    530                 535                 540                 


Leu Lys Pro Glu Asp Thr Ala Val Tyr Tyr Cys Asn Ala Arg Leu Trp 
545                 550                 555                 560 


Gly Leu Gly Ile Arg Asn Tyr Trp Gly Gln Gly Thr Leu Val Thr Val 
                565                 570                 575     


Ser Ser 
        


<210>  107
<211>  213
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 3 sequence of BCMA/CD3 TsAb in TriSpecific-V3 
       format

<400>  107

Gln Ile Val Leu Ser Gln Ser Pro Ala Ile Leu Ser Ala Ser Pro Gly 
1               5                   10                  15      


Glu Lys Val Thr Met Thr Cys Arg Ala Ser Ser Ser Val Ser Tyr Met 
            20                  25                  30          


His Trp Tyr Gln Gln Lys Pro Gly Ser Ser Pro Lys Pro Trp Ile Tyr 
        35                  40                  45              


Ala Ala Ser Asn Arg Ala Ser Gly Val Pro Ala Arg Phe Ser Gly Ser 
    50                  55                  60                  


Gly Ser Gly Thr Ser Tyr Ser Leu Thr Ile Ser Arg Val Glu Ala Glu 
65                  70                  75                  80  


Asp Ala Ala Thr Tyr Tyr Cys Gln Gln Trp Ser Ser Asn Pro Pro Thr 
                85                  90                  95      


Phe Gly Gly Gly Thr Lys Leu Glu Thr Lys Arg Thr Val Ala Ala Pro 
            100                 105                 110         


Ser Val Phe Ile Phe Pro Pro Ser Asp Glu Gln Leu Lys Ser Gly Thr 
        115                 120                 125             


Ala Ser Val Val Cys Leu Leu Asn Asn Phe Tyr Pro Arg Glu Ala Lys 
    130                 135                 140                 


Val Gln Trp Lys Val Asp Asn Ala Leu Gln Ser Gly Asn Ser Gln Glu 
145                 150                 155                 160 


Ser Val Thr Glu Gln Asp Ser Lys Asp Ser Thr Tyr Ser Leu Ser Ser 
                165                 170                 175     


Thr Leu Thr Leu Ser Lys Ala Asp Tyr Glu Lys His Lys Val Tyr Ala 
            180                 185                 190         


Cys Glu Val Thr His Gln Gly Leu Ser Ser Pro Val Thr Lys Ser Phe 
        195                 200                 205             


Asn Arg Gly Glu Cys 
    210             


<210>  108
<211>  588
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 1 sequence of BCMA/CD3 BsAb in BiSpecific-V4 
       format

<400>  108

Gln Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Ala Gly Gly 
1               5                   10                  15      


Ser Leu Arg Leu Ser Cys Ala Ser Ser Gly Arg Leu Phe Arg Tyr Thr 
            20                  25                  30          


Asp Met Ala Trp Tyr Arg Gln Ala Pro Gly Lys Gln Arg Glu Leu Val 
        35                  40                  45              


Ala Phe Ser Tyr Val Ser Gly Arg Thr Asn Tyr Ala Asp Ser Val Lys 
    50                  55                  60                  


Gly Arg Phe Thr Ile Ser Arg Asp Asn Val Lys Lys Val Val Tyr Leu 
65                  70                  75                  80  


Gln Met Ser Ser Leu Thr Pro Glu Asp Thr Ala Val Tyr Tyr Cys Ala 
                85                  90                  95      


Gln Gly Arg Ser Pro Tyr Arg Trp Gly Ser Tyr Ser Ser Met Phe Gly 
            100                 105                 110         


Ser Trp Gly Gln Gly Thr Leu Val Thr Val Ser Ser Gly Gly Gly Gly 
        115                 120                 125             


Ser Gly Gly Gly Gly Ser Gly Gly Gly Gly Ser Gln Val Gln Leu Gln 
    130                 135                 140                 


Gln Ser Gly Ala Glu Leu Ala Arg Pro Gly Ala Ser Val Lys Met Ser 
145                 150                 155                 160 


Cys Lys Ala Ser Gly Tyr Thr Phe Thr Ser Tyr Thr Met His Trp Val 
                165                 170                 175     


Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile Gly Tyr Ile Asn Pro 
            180                 185                 190         


Ser Ser Gly Tyr Thr Lys Tyr Asn Gln Lys Phe Lys Asp Lys Ala Thr 
        195                 200                 205             


Leu Thr Ala Asp Lys Ser Ser Ser Thr Ala Tyr Met Gln Leu Ser Ser 
    210                 215                 220                 


Leu Thr Ser Glu Asp Ser Ala Val Tyr Tyr Cys Ala Arg Trp Gln Asp 
225                 230                 235                 240 


Tyr Asp Val Tyr Phe Asp Tyr Trp Gly Gln Gly Thr Thr Leu Thr Val 
                245                 250                 255     


Ser Ser Ala Ser Thr Lys Gly Pro Ser Val Phe Pro Leu Ala Pro Ser 
            260                 265                 270         


Ser Lys Ser Thr Ser Gly Gly Thr Ala Ala Leu Gly Cys Leu Val Lys 
        275                 280                 285             


Asp Tyr Phe Pro Glu Pro Val Thr Val Ser Trp Asn Ser Gly Ala Leu 
    290                 295                 300                 


Thr Ser Gly Val His Thr Phe Pro Ala Val Leu Gln Ser Ser Gly Leu 
305                 310                 315                 320 


Tyr Ser Leu Ser Ser Val Val Thr Val Pro Ser Ser Ser Leu Gly Thr 
                325                 330                 335     


Gln Thr Tyr Ile Cys Asn Val Asn His Lys Pro Ser Asn Thr Lys Val 
            340                 345                 350         


Asp Lys Lys Val Glu Pro Lys Ser Cys Asp Lys Thr His Thr Cys Pro 
        355                 360                 365             


Pro Cys Pro Ala Pro Glu Leu Leu Gly Gly Pro Ser Val Phe Leu Phe 
    370                 375                 380                 


Pro Pro Lys Pro Lys Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Val 
385                 390                 395                 400 


Thr Cys Val Val Val Asp Val Ser His Glu Asp Pro Glu Val Lys Phe 
                405                 410                 415     


Asn Trp Tyr Val Asp Gly Val Glu Val His Asn Ala Lys Thr Lys Pro 
            420                 425                 430         


Arg Glu Glu Gln Tyr Asn Ser Thr Tyr Arg Val Val Ser Val Leu Thr 
        435                 440                 445             


Val Leu His Gln Asp Trp Leu Asn Gly Lys Glu Tyr Lys Cys Lys Val 
    450                 455                 460                 


Ser Asn Lys Ala Leu Pro Ala Pro Ile Glu Lys Thr Ile Ser Lys Ala 
465                 470                 475                 480 


Lys Gly Gln Pro Arg Glu Pro Gln Val Tyr Thr Leu Pro Pro Ser Arg 
                485                 490                 495     


Asp Glu Leu Thr Lys Asn Gln Val Ser Leu Thr Cys Leu Val Lys Gly 
            500                 505                 510         


Phe Tyr Pro Ser Asp Ile Ala Val Glu Trp Glu Ser Asn Gly Gln Pro 
        515                 520                 525             


Glu Asn Asn Tyr Lys Thr Thr Pro Pro Val Leu Asp Ser Asp Gly Ser 
    530                 535                 540                 


Phe Phe Leu Tyr Ser Lys Leu Thr Val Asp Lys Ser Arg Trp Gln Gln 
545                 550                 555                 560 


Gly Asn Val Phe Ser Cys Ser Val Met His Glu Ala Leu His Asn His 
                565                 570                 575     


Tyr Thr Gln Lys Ser Leu Ser Leu Ser Pro Gly Lys 
            580                 585             


<210>  109
<211>  583
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 1 sequence of BCMA/CD3 BsAb in BiSpecific-V4 
       format

<400>  109

Gln Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Ala Gly Gly 
1               5                   10                  15      


Ser Leu Arg Leu Ser Cys Ala Ser Ser Gly Arg Leu Phe Arg Tyr Thr 
            20                  25                  30          


Asp Met Ala Trp Tyr Arg Gln Ala Pro Gly Lys Gln Arg Glu Leu Val 
        35                  40                  45              


Ala Phe Ser Tyr Val Ser Gly Arg Thr Asn Tyr Ala Asp Ser Val Lys 
    50                  55                  60                  


Gly Arg Phe Thr Ile Ser Arg Asp Asn Val Lys Lys Val Val Tyr Leu 
65                  70                  75                  80  


Gln Met Ser Ser Leu Thr Pro Glu Asp Thr Ala Val Tyr Tyr Cys Ala 
                85                  90                  95      


Gln Gly Arg Ser Pro Tyr Arg Trp Gly Ser Tyr Ser Ser Met Phe Gly 
            100                 105                 110         


Ser Trp Gly Gln Gly Thr Leu Val Thr Val Ser Ser Gly Gly Gly Gly 
        115                 120                 125             


Ser Gly Gly Gly Gly Ser Gln Val Gln Leu Gln Gln Ser Gly Ala Glu 
    130                 135                 140                 


Leu Ala Arg Pro Gly Ala Ser Val Lys Met Ser Cys Lys Ala Ser Gly 
145                 150                 155                 160 


Tyr Thr Phe Thr Ser Tyr Thr Met His Trp Val Lys Gln Arg Pro Gly 
                165                 170                 175     


Gln Gly Leu Glu Trp Ile Gly Tyr Ile Asn Pro Ser Ser Gly Tyr Thr 
            180                 185                 190         


Lys Tyr Asn Gln Lys Phe Lys Asp Lys Ala Thr Leu Thr Ala Asp Lys 
        195                 200                 205             


Ser Ser Ser Thr Ala Tyr Met Gln Leu Ser Ser Leu Thr Ser Glu Asp 
    210                 215                 220                 


Ser Ala Val Tyr Tyr Cys Ala Arg Trp Gln Asp Tyr Asp Val Tyr Phe 
225                 230                 235                 240 


Asp Tyr Trp Gly Gln Gly Thr Thr Leu Thr Val Ser Ser Ala Ser Thr 
                245                 250                 255     


Lys Gly Pro Ser Val Phe Pro Leu Ala Pro Ser Ser Lys Ser Thr Ser 
            260                 265                 270         


Gly Gly Thr Ala Ala Leu Gly Cys Leu Val Lys Asp Tyr Phe Pro Glu 
        275                 280                 285             


Pro Val Thr Val Ser Trp Asn Ser Gly Ala Leu Thr Ser Gly Val His 
    290                 295                 300                 


Thr Phe Pro Ala Val Leu Gln Ser Ser Gly Leu Tyr Ser Leu Ser Ser 
305                 310                 315                 320 


Val Val Thr Val Pro Ser Ser Ser Leu Gly Thr Gln Thr Tyr Ile Cys 
                325                 330                 335     


Asn Val Asn His Lys Pro Ser Asn Thr Lys Val Asp Lys Lys Val Gly 
            340                 345                 350         


Gly Gly Gly Ser Asp Lys Thr His Thr Cys Pro Pro Cys Pro Ala Pro 
        355                 360                 365             


Glu Leu Leu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro Lys Pro Lys 
    370                 375                 380                 


Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val Val 
385                 390                 395                 400 


Asp Val Ser His Glu Asp Pro Glu Val Lys Phe Asn Trp Tyr Val Asp 
                405                 410                 415     


Gly Val Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln Tyr 
            420                 425                 430         


Asn Ser Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu His Gln Asp 
        435                 440                 445             


Trp Leu Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu 
    450                 455                 460                 


Pro Ala Pro Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg 
465                 470                 475                 480 


Glu Pro Gln Val Tyr Thr Leu Pro Pro Ser Arg Asp Glu Leu Thr Lys 
                485                 490                 495     


Asn Gln Val Ser Leu Thr Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp 
            500                 505                 510         


Ile Ala Val Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys 
        515                 520                 525             


Thr Thr Pro Pro Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Tyr Ser 
    530                 535                 540                 


Lys Leu Thr Val Asp Lys Ser Arg Trp Gln Gln Gly Asn Val Phe Ser 
545                 550                 555                 560 


Cys Ser Val Met His Glu Ala Leu His Asn His Tyr Thr Gln Lys Ser 
                565                 570                 575     


Leu Ser Leu Ser Pro Gly Lys 
            580             


<210>  110
<211>  213
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 2 sequence of BCMA/CD3 BsAb in BiSpecific-V4 
       format

<400>  110

Gln Ile Val Leu Ser Gln Ser Pro Ala Ile Leu Ser Ala Ser Pro Gly 
1               5                   10                  15      


Glu Lys Val Thr Met Thr Cys Arg Ala Ser Ser Ser Val Ser Tyr Met 
            20                  25                  30          


His Trp Tyr Gln Gln Lys Pro Gly Ser Ser Pro Lys Pro Trp Ile Tyr 
        35                  40                  45              


Ala Ala Ser Asn Arg Ala Ser Gly Val Pro Ala Arg Phe Ser Gly Ser 
    50                  55                  60                  


Gly Ser Gly Thr Ser Tyr Ser Leu Thr Ile Ser Arg Val Glu Ala Glu 
65                  70                  75                  80  


Asp Ala Ala Thr Tyr Tyr Cys Gln Gln Trp Ser Ser Asn Pro Pro Thr 
                85                  90                  95      


Phe Gly Gly Gly Thr Lys Leu Glu Thr Lys Arg Thr Val Ala Ala Pro 
            100                 105                 110         


Ser Val Phe Ile Phe Pro Pro Ser Asp Glu Gln Leu Lys Ser Gly Thr 
        115                 120                 125             


Ala Ser Val Val Cys Leu Leu Asn Asn Phe Tyr Pro Arg Glu Ala Lys 
    130                 135                 140                 


Val Gln Trp Lys Val Asp Asn Ala Leu Gln Ser Gly Asn Ser Gln Glu 
145                 150                 155                 160 


Ser Val Thr Glu Gln Asp Ser Lys Asp Ser Thr Tyr Ser Leu Ser Ser 
                165                 170                 175     


Thr Leu Thr Leu Ser Lys Ala Asp Tyr Glu Lys His Lys Val Tyr Ala 
            180                 185                 190         


Cys Glu Val Thr His Gln Gly Leu Ser Ser Pro Val Thr Lys Ser Phe 
        195                 200                 205             


Asn Arg Gly Glu Cys 
    210             


<210>  111
<211>  588
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 1 sequence of BCMA/CD3 TsAb in TriSpecific-V4 
       format

<400>  111

Gln Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Ala Gly Gly 
1               5                   10                  15      


Ser Leu Arg Leu Ser Cys Ala Ser Ser Gly Arg Leu Phe Arg Tyr Thr 
            20                  25                  30          


Asp Met Ala Trp Tyr Arg Gln Ala Pro Gly Lys Gln Arg Glu Leu Val 
        35                  40                  45              


Ala Phe Ser Tyr Val Ser Gly Arg Thr Asn Tyr Ala Asp Ser Val Lys 
    50                  55                  60                  


Gly Arg Phe Thr Ile Ser Arg Asp Asn Val Lys Lys Val Val Tyr Leu 
65                  70                  75                  80  


Gln Met Ser Ser Leu Thr Pro Glu Asp Thr Ala Val Tyr Tyr Cys Ala 
                85                  90                  95      


Gln Gly Arg Ser Pro Tyr Arg Trp Gly Ser Tyr Ser Ser Met Phe Gly 
            100                 105                 110         


Ser Trp Gly Gln Gly Thr Leu Val Thr Val Ser Ser Gly Gly Gly Gly 
        115                 120                 125             


Ser Gly Gly Gly Gly Ser Gly Gly Gly Gly Ser Gln Val Gln Leu Gln 
    130                 135                 140                 


Gln Ser Gly Ala Glu Leu Ala Arg Pro Gly Ala Ser Val Lys Met Ser 
145                 150                 155                 160 


Cys Lys Ala Ser Gly Tyr Thr Phe Thr Ser Tyr Thr Met His Trp Val 
                165                 170                 175     


Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile Gly Tyr Ile Asn Pro 
            180                 185                 190         


Ser Ser Gly Tyr Thr Lys Tyr Asn Gln Lys Phe Lys Asp Lys Ala Thr 
        195                 200                 205             


Leu Thr Ala Asp Lys Ser Ser Ser Thr Ala Tyr Met Gln Leu Ser Ser 
    210                 215                 220                 


Leu Thr Ser Glu Asp Ser Ala Val Tyr Tyr Cys Ala Arg Trp Gln Asp 
225                 230                 235                 240 


Tyr Asp Val Tyr Phe Asp Tyr Trp Gly Gln Gly Thr Thr Leu Thr Val 
                245                 250                 255     


Ser Ser Ala Ser Thr Lys Gly Pro Ser Val Phe Pro Leu Ala Pro Ser 
            260                 265                 270         


Ser Lys Ser Thr Ser Gly Gly Thr Ala Ala Leu Gly Cys Leu Val Lys 
        275                 280                 285             


Asp Tyr Phe Pro Glu Pro Val Thr Val Ser Trp Asn Ser Gly Ala Leu 
    290                 295                 300                 


Thr Ser Gly Val His Thr Phe Pro Ala Val Leu Gln Ser Ser Gly Leu 
305                 310                 315                 320 


Tyr Ser Leu Ser Ser Val Val Thr Val Pro Ser Ser Ser Leu Gly Thr 
                325                 330                 335     


Gln Thr Tyr Ile Cys Asn Val Asn His Lys Pro Ser Asn Thr Lys Val 
            340                 345                 350         


Asp Lys Lys Val Glu Pro Lys Ser Cys Asp Lys Thr His Thr Cys Pro 
        355                 360                 365             


Pro Cys Pro Ala Pro Glu Leu Leu Gly Gly Pro Ser Val Phe Leu Phe 
    370                 375                 380                 


Pro Pro Lys Pro Lys Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Val 
385                 390                 395                 400 


Thr Cys Val Val Val Asp Val Ser His Glu Asp Pro Glu Val Lys Phe 
                405                 410                 415     


Asn Trp Tyr Val Asp Gly Val Glu Val His Asn Ala Lys Thr Lys Pro 
            420                 425                 430         


Arg Glu Glu Gln Tyr Asn Ser Thr Tyr Arg Val Val Ser Val Leu Thr 
        435                 440                 445             


Val Leu His Gln Asp Trp Leu Asn Gly Lys Glu Tyr Lys Cys Lys Val 
    450                 455                 460                 


Ser Asn Lys Ala Leu Pro Ala Pro Ile Glu Lys Thr Ile Ser Lys Ala 
465                 470                 475                 480 


Lys Gly Gln Pro Arg Glu Pro Gln Val Tyr Thr Leu Pro Pro Tyr Arg 
                485                 490                 495     


Glu Glu Met Thr Lys Asn Gln Val Ser Leu Tyr Cys Leu Val Lys Gly 
            500                 505                 510         


Phe Tyr Pro Ser Asp Ile Ala Val Glu Trp Glu Ser Asn Gly Gln Pro 
        515                 520                 525             


Glu Asn Asn Tyr Lys Thr Thr Pro Pro Val Leu Asp Ser Asp Gly Ser 
    530                 535                 540                 


Phe Phe Leu Tyr Ser Lys Leu Thr Val Asp Lys Ser Arg Trp Gln Gln 
545                 550                 555                 560 


Gly Asn Val Phe Ser Cys Ser Val Met His Glu Ala Leu His Asn His 
                565                 570                 575     


Tyr Thr Gln Lys Ser Leu Ser Leu Ser Pro Gly Lys 
            580                 585             


<210>  112
<211>  583
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 1 sequence of BCMA/CD3 TsAb in TriSpecific-V4 
       format

<400>  112

Gln Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Ala Gly Gly 
1               5                   10                  15      


Ser Leu Arg Leu Ser Cys Ala Ser Ser Gly Arg Leu Phe Arg Tyr Thr 
            20                  25                  30          


Asp Met Ala Trp Tyr Arg Gln Ala Pro Gly Lys Gln Arg Glu Leu Val 
        35                  40                  45              


Ala Phe Ser Tyr Val Ser Gly Arg Thr Asn Tyr Ala Asp Ser Val Lys 
    50                  55                  60                  


Gly Arg Phe Thr Ile Ser Arg Asp Asn Val Lys Lys Val Val Tyr Leu 
65                  70                  75                  80  


Gln Met Ser Ser Leu Thr Pro Glu Asp Thr Ala Val Tyr Tyr Cys Ala 
                85                  90                  95      


Gln Gly Arg Ser Pro Tyr Arg Trp Gly Ser Tyr Ser Ser Met Phe Gly 
            100                 105                 110         


Ser Trp Gly Gln Gly Thr Leu Val Thr Val Ser Ser Gly Gly Gly Gly 
        115                 120                 125             


Ser Gly Gly Gly Gly Ser Gln Val Gln Leu Gln Gln Ser Gly Ala Glu 
    130                 135                 140                 


Leu Ala Arg Pro Gly Ala Ser Val Lys Met Ser Cys Lys Ala Ser Gly 
145                 150                 155                 160 


Tyr Thr Phe Thr Ser Tyr Thr Met His Trp Val Lys Gln Arg Pro Gly 
                165                 170                 175     


Gln Gly Leu Glu Trp Ile Gly Tyr Ile Asn Pro Ser Ser Gly Tyr Thr 
            180                 185                 190         


Lys Tyr Asn Gln Lys Phe Lys Asp Lys Ala Thr Leu Thr Ala Asp Lys 
        195                 200                 205             


Ser Ser Ser Thr Ala Tyr Met Gln Leu Ser Ser Leu Thr Ser Glu Asp 
    210                 215                 220                 


Ser Ala Val Tyr Tyr Cys Ala Arg Trp Gln Asp Tyr Asp Val Tyr Phe 
225                 230                 235                 240 


Asp Tyr Trp Gly Gln Gly Thr Thr Leu Thr Val Ser Ser Ala Ser Thr 
                245                 250                 255     


Lys Gly Pro Ser Val Phe Pro Leu Ala Pro Ser Ser Lys Ser Thr Ser 
            260                 265                 270         


Gly Gly Thr Ala Ala Leu Gly Cys Leu Val Lys Asp Tyr Phe Pro Glu 
        275                 280                 285             


Pro Val Thr Val Ser Trp Asn Ser Gly Ala Leu Thr Ser Gly Val His 
    290                 295                 300                 


Thr Phe Pro Ala Val Leu Gln Ser Ser Gly Leu Tyr Ser Leu Ser Ser 
305                 310                 315                 320 


Val Val Thr Val Pro Ser Ser Ser Leu Gly Thr Gln Thr Tyr Ile Cys 
                325                 330                 335     


Asn Val Asn His Lys Pro Ser Asn Thr Lys Val Asp Lys Lys Val Gly 
            340                 345                 350         


Gly Gly Gly Ser Asp Lys Thr His Thr Cys Pro Pro Cys Pro Ala Pro 
        355                 360                 365             


Glu Leu Leu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro Lys Pro Lys 
    370                 375                 380                 


Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val Val 
385                 390                 395                 400 


Asp Val Ser His Glu Asp Pro Glu Val Lys Phe Asn Trp Tyr Val Asp 
                405                 410                 415     


Gly Val Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln Tyr 
            420                 425                 430         


Asn Ser Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu His Gln Asp 
        435                 440                 445             


Trp Leu Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu 
    450                 455                 460                 


Pro Ala Pro Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg 
465                 470                 475                 480 


Glu Pro Gln Val Tyr Thr Leu Pro Pro Tyr Arg Glu Glu Met Thr Lys 
                485                 490                 495     


Asn Gln Val Ser Leu Tyr Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp 
            500                 505                 510         


Ile Ala Val Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys 
        515                 520                 525             


Thr Thr Pro Pro Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Tyr Ser 
    530                 535                 540                 


Lys Leu Thr Val Asp Lys Ser Arg Trp Gln Gln Gly Asn Val Phe Ser 
545                 550                 555                 560 


Cys Ser Val Met His Glu Ala Leu His Asn His Tyr Thr Gln Lys Ser 
                565                 570                 575     


Leu Ser Leu Ser Pro Gly Lys 
            580             


<210>  113
<211>  583
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 2 sequence of BCMA/CD3 TsAb in TriSpecific-V4 
       format

<400>  113

Gln Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Ala Gly Gly 
1               5                   10                  15      


Ser Leu Arg Leu Ser Cys Thr Ala Ser Gly Arg Thr Phe Gly Trp Tyr 
            20                  25                  30          


Thr Met Gly Trp Phe Arg Gln Gly Pro Gly Lys Glu Arg Glu Phe Val 
        35                  40                  45              


Ala Ala Ile Ser Pro Ser Gly Gly Ala Thr Tyr Tyr Ala Asp Ser Val 
    50                  55                  60                  


Lys Gly Arg Phe Thr Ile Ser Arg Asp Tyr Ala Lys Asn Ala Val Tyr 
65                  70                  75                  80  


Leu Gln Met Asn Ser Leu Lys Pro Glu Asp Thr Ala Val Tyr Tyr Cys 
                85                  90                  95      


Asn Ala Arg Leu Trp Gly Leu Gly Ile Arg Asn Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Leu Val Thr Val Ser Ser Gly Gly Gly Gly Ser Gly Gly Gly Gly 
        115                 120                 125             


Ser Gly Gly Gly Gly Ser Gln Val Gln Leu Gln Gln Ser Gly Ala Glu 
    130                 135                 140                 


Leu Ala Arg Pro Gly Ala Ser Val Lys Met Ser Cys Lys Ala Ser Gly 
145                 150                 155                 160 


Tyr Thr Phe Thr Ser Tyr Thr Met His Trp Val Lys Gln Arg Pro Gly 
                165                 170                 175     


Gln Gly Leu Glu Trp Ile Gly Tyr Ile Asn Pro Ser Ser Gly Tyr Thr 
            180                 185                 190         


Lys Tyr Asn Gln Lys Phe Lys Asp Lys Ala Thr Leu Thr Ala Asp Lys 
        195                 200                 205             


Ser Ser Ser Thr Ala Tyr Met Gln Leu Ser Ser Leu Thr Ser Glu Asp 
    210                 215                 220                 


Ser Ala Val Tyr Tyr Cys Ala Arg Trp Gln Asp Tyr Asp Val Tyr Phe 
225                 230                 235                 240 


Asp Tyr Trp Gly Gln Gly Thr Thr Leu Thr Val Ser Ser Ala Ser Thr 
                245                 250                 255     


Lys Gly Pro Ser Val Phe Pro Leu Ala Pro Ser Ser Lys Ser Thr Ser 
            260                 265                 270         


Gly Gly Thr Ala Ala Leu Gly Cys Leu Val Lys Asp Tyr Phe Pro Glu 
        275                 280                 285             


Pro Val Thr Val Ser Trp Asn Ser Gly Ala Leu Thr Ser Gly Val His 
    290                 295                 300                 


Thr Phe Pro Ala Val Leu Gln Ser Ser Gly Leu Tyr Ser Leu Ser Ser 
305                 310                 315                 320 


Val Val Thr Val Pro Ser Ser Ser Leu Gly Thr Gln Thr Tyr Ile Cys 
                325                 330                 335     


Asn Val Asn His Lys Pro Ser Asn Thr Lys Val Asp Lys Lys Val Glu 
            340                 345                 350         


Pro Lys Ser Cys Asp Lys Thr His Thr Cys Pro Pro Cys Pro Ala Pro 
        355                 360                 365             


Glu Leu Leu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro Lys Pro Lys 
    370                 375                 380                 


Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val Val 
385                 390                 395                 400 


Asp Val Ser His Glu Asp Pro Glu Val Lys Phe Asn Trp Tyr Val Asp 
                405                 410                 415     


Gly Val Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln Tyr 
            420                 425                 430         


Asn Ser Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu His Gln Asp 
        435                 440                 445             


Trp Leu Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu 
    450                 455                 460                 


Pro Ala Pro Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg 
465                 470                 475                 480 


Glu Pro Glu Val Tyr Thr Leu Pro Pro Ser Arg Glu Glu Met Thr Lys 
                485                 490                 495     


Asn Gln Val Ser Leu Thr Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp 
            500                 505                 510         


Ile Ala Val Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys 
        515                 520                 525             


Thr Thr Pro Pro Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Thr Ser 
    530                 535                 540                 


Lys Leu Thr Val Asp Lys Ser Arg Trp Gln Gln Gly Asn Val Phe Ser 
545                 550                 555                 560 


Cys Ser Val Met His Glu Ala Leu His Asn His Tyr Thr Gln Lys Ser 
                565                 570                 575     


Leu Ser Leu Ser Pro Gly Lys 
            580             


<210>  114
<211>  578
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 2 sequence of BCMA/CD3 TsAb in TriSpecific-V4 
       format

<400>  114

Gln Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Ala Gly Gly 
1               5                   10                  15      


Ser Leu Arg Leu Ser Cys Thr Ala Ser Gly Arg Thr Phe Gly Trp Tyr 
            20                  25                  30          


Thr Met Gly Trp Phe Arg Gln Gly Pro Gly Lys Glu Arg Glu Phe Val 
        35                  40                  45              


Ala Ala Ile Ser Pro Ser Gly Gly Ala Thr Tyr Tyr Ala Asp Ser Val 
    50                  55                  60                  


Lys Gly Arg Phe Thr Ile Ser Arg Asp Tyr Ala Lys Asn Ala Val Tyr 
65                  70                  75                  80  


Leu Gln Met Asn Ser Leu Lys Pro Glu Asp Thr Ala Val Tyr Tyr Cys 
                85                  90                  95      


Asn Ala Arg Leu Trp Gly Leu Gly Ile Arg Asn Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Leu Val Thr Val Ser Ser Gly Gly Gly Gly Ser Gly Gly Gly Gly 
        115                 120                 125             


Ser Gln Val Gln Leu Gln Gln Ser Gly Ala Glu Leu Ala Arg Pro Gly 
    130                 135                 140                 


Ala Ser Val Lys Met Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Ser 
145                 150                 155                 160 


Tyr Thr Met His Trp Val Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp 
                165                 170                 175     


Ile Gly Tyr Ile Asn Pro Ser Ser Gly Tyr Thr Lys Tyr Asn Gln Lys 
            180                 185                 190         


Phe Lys Asp Lys Ala Thr Leu Thr Ala Asp Lys Ser Ser Ser Thr Ala 
        195                 200                 205             


Tyr Met Gln Leu Ser Ser Leu Thr Ser Glu Asp Ser Ala Val Tyr Tyr 
    210                 215                 220                 


Cys Ala Arg Trp Gln Asp Tyr Asp Val Tyr Phe Asp Tyr Trp Gly Gln 
225                 230                 235                 240 


Gly Thr Thr Leu Thr Val Ser Ser Ala Ser Thr Lys Gly Pro Ser Val 
                245                 250                 255     


Phe Pro Leu Ala Pro Ser Ser Lys Ser Thr Ser Gly Gly Thr Ala Ala 
            260                 265                 270         


Leu Gly Cys Leu Val Lys Asp Tyr Phe Pro Glu Pro Val Thr Val Ser 
        275                 280                 285             


Trp Asn Ser Gly Ala Leu Thr Ser Gly Val His Thr Phe Pro Ala Val 
    290                 295                 300                 


Leu Gln Ser Ser Gly Leu Tyr Ser Leu Ser Ser Val Val Thr Val Pro 
305                 310                 315                 320 


Ser Ser Ser Leu Gly Thr Gln Thr Tyr Ile Cys Asn Val Asn His Lys 
                325                 330                 335     


Pro Ser Asn Thr Lys Val Asp Lys Lys Val Gly Gly Gly Gly Ser Asp 
            340                 345                 350         


Lys Thr His Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu Leu Gly Gly 
        355                 360                 365             


Pro Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu Met Ile 
    370                 375                 380                 


Ser Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val Ser His Glu 
385                 390                 395                 400 


Asp Pro Glu Val Lys Phe Asn Trp Tyr Val Asp Gly Val Glu Val His 
                405                 410                 415     


Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr Tyr Arg 
            420                 425                 430         


Val Val Ser Val Leu Thr Val Leu His Gln Asp Trp Leu Asn Gly Lys 
        435                 440                 445             


Glu Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu Pro Ala Pro Ile Glu 
    450                 455                 460                 


Lys Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Glu Val Tyr 
465                 470                 475                 480 


Thr Leu Pro Pro Ser Arg Glu Glu Met Thr Lys Asn Gln Val Ser Leu 
                485                 490                 495     


Thr Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val Glu Trp 
            500                 505                 510         


Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr Pro Pro Val 
        515                 520                 525             


Leu Asp Ser Asp Gly Ser Phe Phe Leu Thr Ser Lys Leu Thr Val Asp 
    530                 535                 540                 


Lys Ser Arg Trp Gln Gln Gly Asn Val Phe Ser Cys Ser Val Met His 
545                 550                 555                 560 


Glu Ala Leu His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu Ser Pro 
                565                 570                 575     


Gly Lys 
        


<210>  115
<211>  213
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 3 sequence of BCMA/CD3 TsAb in TriSpecific-V4 
       format

<400>  115

Gln Ile Val Leu Ser Gln Ser Pro Ala Ile Leu Ser Ala Ser Pro Gly 
1               5                   10                  15      


Glu Lys Val Thr Met Thr Cys Arg Ala Ser Ser Ser Val Ser Tyr Met 
            20                  25                  30          


His Trp Tyr Gln Gln Lys Pro Gly Ser Ser Pro Lys Pro Trp Ile Tyr 
        35                  40                  45              


Ala Ala Ser Asn Arg Ala Ser Gly Val Pro Ala Arg Phe Ser Gly Ser 
    50                  55                  60                  


Gly Ser Gly Thr Ser Tyr Ser Leu Thr Ile Ser Arg Val Glu Ala Glu 
65                  70                  75                  80  


Asp Ala Ala Thr Tyr Tyr Cys Gln Gln Trp Ser Ser Asn Pro Pro Thr 
                85                  90                  95      


Phe Gly Gly Gly Thr Lys Leu Glu Thr Lys Arg Thr Val Ala Ala Pro 
            100                 105                 110         


Ser Val Phe Ile Phe Pro Pro Ser Asp Glu Gln Leu Lys Ser Gly Thr 
        115                 120                 125             


Ala Ser Val Val Cys Leu Leu Asn Asn Phe Tyr Pro Arg Glu Ala Lys 
    130                 135                 140                 


Val Gln Trp Lys Val Asp Asn Ala Leu Gln Ser Gly Asn Ser Gln Glu 
145                 150                 155                 160 


Ser Val Thr Glu Gln Asp Ser Lys Asp Ser Thr Tyr Ser Leu Ser Ser 
                165                 170                 175     


Thr Leu Thr Leu Ser Lys Ala Asp Tyr Glu Lys His Lys Val Tyr Ala 
            180                 185                 190         


Cys Glu Val Thr His Gln Gly Leu Ser Ser Pro Val Thr Lys Ser Phe 
        195                 200                 205             


Asn Arg Gly Glu Cys 
    210             


<210>  116
<211>  355
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 1 sequence of CD38/CD3 BsAb in BiSpecific-V0 
       format

<400>  116

Glu Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Ala Gly Gly 
1               5                   10                  15      


Ser Leu Arg Leu Ser Cys Ala Val Ser Gly Thr Val Gly Pro Thr Val 
            20                  25                  30          


Met Gly Trp Phe Arg Gln Ala Pro Gly Lys Lys Arg Glu Phe Val Ala 
        35                  40                  45              


Leu Ile Gly Trp Thr Gly Gly Val Thr Ala Tyr Ala Asp Ser Val Lys 
    50                  55                  60                  


Asp Arg Phe Thr Ile Ser Arg Asp Cys Ala Glu Asn Arg Val Asp Leu 
65                  70                  75                  80  


Gln Met Asp Ser Leu Lys Pro Glu Asp Thr Ala Val Tyr Tyr Cys Ala 
                85                  90                  95      


Ala Asp Ser Asn Arg Arg Arg Tyr Tyr Gly Pro Tyr Glu Tyr Asp Ser 
            100                 105                 110         


Trp Gly Gln Gly Thr Leu Val Thr Val Ser Ser Glu Pro Lys Ser Cys 
        115                 120                 125             


Asp Lys Thr His Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu Leu Gly 
    130                 135                 140                 


Gly Pro Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu Met 
145                 150                 155                 160 


Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val Ser His 
                165                 170                 175     


Glu Asp Pro Glu Val Lys Phe Asn Trp Tyr Val Asp Gly Val Glu Val 
            180                 185                 190         


His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr Tyr 
        195                 200                 205             


Arg Val Val Ser Val Leu Thr Val Leu His Gln Asp Trp Leu Asn Gly 
    210                 215                 220                 


Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu Pro Ala Pro Ile 
225                 230                 235                 240 


Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Gln Val 
                245                 250                 255     


Tyr Thr Leu Pro Pro Tyr Arg Glu Glu Met Thr Lys Asn Gln Val Ser 
            260                 265                 270         


Leu Tyr Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val Glu 
        275                 280                 285             


Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr Pro Pro 
    290                 295                 300                 


Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Tyr Ser Lys Leu Thr Val 
305                 310                 315                 320 


Asp Lys Ser Arg Trp Gln Gln Gly Asn Val Phe Ser Cys Ser Val Met 
                325                 330                 335     


His Glu Ala Leu His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu Ser 
            340                 345                 350         


Pro Gly Lys 
        355 


<210>  117
<211>  355
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 1 sequence of CD38/CD3 BsAb in BiSpecific-V0 
       format

<400>  117

Glu Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Ala Gly Gly 
1               5                   10                  15      


Ser Leu Arg Leu Ser Cys Ala Val Ser Gly Thr Val Gly Pro Thr Val 
            20                  25                  30          


Met Gly Trp Phe Arg Gln Ala Pro Gly Lys Lys Arg Glu Phe Val Ala 
        35                  40                  45              


Leu Ile Gly Trp Thr Gly Gly Val Thr Ala Tyr Ala Asp Ser Val Lys 
    50                  55                  60                  


Asp Arg Phe Thr Ile Ser Arg Asp Cys Ala Glu Asn Arg Val Asp Leu 
65                  70                  75                  80  


Gln Met Asp Ser Leu Lys Pro Glu Asp Thr Ala Val Tyr Tyr Cys Ala 
                85                  90                  95      


Ala Asp Ser Asn Arg Arg Arg Tyr Tyr Gly Pro Tyr Glu Tyr Asp Ser 
            100                 105                 110         


Trp Gly Gln Gly Thr Leu Val Thr Val Ser Ser Gly Gly Gly Gly Ser 
        115                 120                 125             


Asp Lys Thr His Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu Leu Gly 
    130                 135                 140                 


Gly Pro Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu Met 
145                 150                 155                 160 


Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val Ser His 
                165                 170                 175     


Glu Asp Pro Glu Val Lys Phe Asn Trp Tyr Val Asp Gly Val Glu Val 
            180                 185                 190         


His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr Tyr 
        195                 200                 205             


Arg Val Val Ser Val Leu Thr Val Leu His Gln Asp Trp Leu Asn Gly 
    210                 215                 220                 


Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu Pro Ala Pro Ile 
225                 230                 235                 240 


Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Gln Val 
                245                 250                 255     


Tyr Thr Leu Pro Pro Tyr Arg Glu Glu Met Thr Lys Asn Gln Val Ser 
            260                 265                 270         


Leu Tyr Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val Glu 
        275                 280                 285             


Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr Pro Pro 
    290                 295                 300                 


Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Tyr Ser Lys Leu Thr Val 
305                 310                 315                 320 


Asp Lys Ser Arg Trp Gln Gln Gly Asn Val Phe Ser Cys Ser Val Met 
                325                 330                 335     


His Glu Ala Leu His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu Ser 
            340                 345                 350         


Pro Gly Lys 
        355 


<210>  118
<211>  351
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 2 sequence of CD38/CD3 BsAb in BiSpecific-V0 
       format

<400>  118

Gln Val Gln Leu Val Gln Ser Gly Ala Glu Val Lys Lys Pro Gly Ala 
1               5                   10                  15      


Ser Val Lys Met Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Ser Tyr 
            20                  25                  30          


Thr Met His Trp Val Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile 
        35                  40                  45              


Ser Tyr Ile Asn Pro Ser Ser Gly Tyr Thr Lys Tyr Asn Gln Lys Phe 
    50                  55                  60                  


Lys Asp Arg Ala Thr Leu Thr Ala Asp Lys Ser Thr Ser Thr Ala Tyr 
65                  70                  75                  80  


Met Glu Leu Ser Ser Leu Arg Ser Glu Asp Thr Ala Val Tyr Tyr Cys 
                85                  90                  95      


Ala Arg Trp Gln Asp Tyr Asp Val Tyr Phe Asp Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Leu Val Thr Val Ser Ser Glu Pro Lys Ser Cys Asp Lys Thr His 
        115                 120                 125             


Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu Leu Gly Gly Pro Ser Val 
    130                 135                 140                 


Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu Met Ile Ser Arg Thr 
145                 150                 155                 160 


Pro Glu Val Thr Cys Val Val Val Asp Val Ser His Glu Asp Pro Glu 
                165                 170                 175     


Val Lys Phe Asn Trp Tyr Val Asp Gly Val Glu Val His Asn Ala Lys 
            180                 185                 190         


Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr Tyr Arg Val Val Ser 
        195                 200                 205             


Val Leu Thr Val Leu His Gln Asp Trp Leu Asn Gly Lys Glu Tyr Lys 
    210                 215                 220                 


Cys Lys Val Ser Asn Lys Ala Leu Pro Ala Pro Ile Glu Lys Thr Ile 
225                 230                 235                 240 


Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Glu Val Tyr Thr Leu Pro 
                245                 250                 255     


Pro Ser Arg Glu Glu Met Thr Lys Asn Gln Val Ser Leu Thr Cys Leu 
            260                 265                 270         


Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val Glu Trp Glu Ser Asn 
        275                 280                 285             


Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr Pro Pro Val Leu Asp Ser 
    290                 295                 300                 


Asp Gly Ser Phe Phe Leu Thr Ser Lys Leu Thr Val Asp Lys Ser Arg 
305                 310                 315                 320 


Trp Gln Gln Gly Asn Val Phe Ser Cys Ser Val Met His Glu Ala Leu 
                325                 330                 335     


His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu Ser Pro Gly Lys 
            340                 345                 350     


<210>  119
<211>  351
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 2 sequence of CD38/CD3 BsAb in BiSpecific-V0 
       format

<400>  119

Gln Val Gln Leu Val Gln Ser Gly Ala Glu Val Lys Lys Pro Gly Ala 
1               5                   10                  15      


Ser Val Lys Met Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Ser Tyr 
            20                  25                  30          


Thr Met His Trp Val Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile 
        35                  40                  45              


Ser Tyr Ile Asn Pro Ser Ser Gly Tyr Thr Lys Tyr Asn Gln Lys Phe 
    50                  55                  60                  


Lys Asp Arg Ala Thr Leu Thr Ala Asp Lys Ser Thr Ser Thr Ala Tyr 
65                  70                  75                  80  


Met Glu Leu Ser Ser Leu Arg Ser Glu Asp Thr Ala Val Tyr Tyr Cys 
                85                  90                  95      


Ala Arg Trp Gln Asp Tyr Asp Val Tyr Phe Asp Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Leu Val Thr Val Ser Ser Gly Gly Gly Gly Ser Asp Lys Thr His 
        115                 120                 125             


Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu Leu Gly Gly Pro Ser Val 
    130                 135                 140                 


Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu Met Ile Ser Arg Thr 
145                 150                 155                 160 


Pro Glu Val Thr Cys Val Val Val Asp Val Ser His Glu Asp Pro Glu 
                165                 170                 175     


Val Lys Phe Asn Trp Tyr Val Asp Gly Val Glu Val His Asn Ala Lys 
            180                 185                 190         


Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr Tyr Arg Val Val Ser 
        195                 200                 205             


Val Leu Thr Val Leu His Gln Asp Trp Leu Asn Gly Lys Glu Tyr Lys 
    210                 215                 220                 


Cys Lys Val Ser Asn Lys Ala Leu Pro Ala Pro Ile Glu Lys Thr Ile 
225                 230                 235                 240 


Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Glu Val Tyr Thr Leu Pro 
                245                 250                 255     


Pro Ser Arg Glu Glu Met Thr Lys Asn Gln Val Ser Leu Thr Cys Leu 
            260                 265                 270         


Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val Glu Trp Glu Ser Asn 
        275                 280                 285             


Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr Pro Pro Val Leu Asp Ser 
    290                 295                 300                 


Asp Gly Ser Phe Phe Leu Thr Ser Lys Leu Thr Val Asp Lys Ser Arg 
305                 310                 315                 320 


Trp Gln Gln Gly Asn Val Phe Ser Cys Ser Val Met His Glu Ala Leu 
                325                 330                 335     


His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu Ser Pro Gly Lys 
            340                 345                 350     


<210>  120
<211>  355
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 1 sequence of CD38/CD3 BsAb in BiSpecific-V2 
       format

<400>  120

Glu Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Ala Gly Gly 
1               5                   10                  15      


Ser Leu Arg Leu Ser Cys Ala Val Ser Gly Thr Val Gly Pro Thr Val 
            20                  25                  30          


Met Gly Trp Phe Arg Gln Ala Pro Gly Lys Lys Arg Glu Phe Val Ala 
        35                  40                  45              


Leu Ile Gly Trp Thr Gly Gly Val Thr Ala Tyr Ala Asp Ser Val Lys 
    50                  55                  60                  


Asp Arg Phe Thr Ile Ser Arg Asp Cys Ala Glu Asn Arg Val Asp Leu 
65                  70                  75                  80  


Gln Met Asp Ser Leu Lys Pro Glu Asp Thr Ala Val Tyr Tyr Cys Ala 
                85                  90                  95      


Ala Asp Ser Asn Arg Arg Arg Tyr Tyr Gly Pro Tyr Glu Tyr Asp Ser 
            100                 105                 110         


Trp Gly Gln Gly Thr Leu Val Thr Val Ser Ser Glu Pro Lys Ser Cys 
        115                 120                 125             


Asp Lys Thr His Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu Leu Gly 
    130                 135                 140                 


Gly Pro Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu Met 
145                 150                 155                 160 


Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val Ser His 
                165                 170                 175     


Glu Asp Pro Glu Val Lys Phe Asn Trp Tyr Val Asp Gly Val Glu Val 
            180                 185                 190         


His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr Tyr 
        195                 200                 205             


Arg Val Val Ser Val Leu Thr Val Leu His Gln Asp Trp Leu Asn Gly 
    210                 215                 220                 


Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu Pro Ala Pro Ile 
225                 230                 235                 240 


Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Gln Val 
                245                 250                 255     


Tyr Thr Leu Pro Pro Tyr Arg Glu Glu Met Thr Lys Asn Gln Val Ser 
            260                 265                 270         


Leu Tyr Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val Glu 
        275                 280                 285             


Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr Pro Pro 
    290                 295                 300                 


Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Tyr Ser Lys Leu Thr Val 
305                 310                 315                 320 


Asp Lys Ser Arg Trp Gln Gln Gly Asn Val Phe Ser Cys Ser Val Met 
                325                 330                 335     


His Glu Ala Leu His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu Ser 
            340                 345                 350         


Pro Gly Lys 
        355 


<210>  121
<211>  355
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 1 sequence of CD38/CD3 BsAb in BiSpecific-V2 
       format

<400>  121

Glu Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Ala Gly Gly 
1               5                   10                  15      


Ser Leu Arg Leu Ser Cys Ala Val Ser Gly Thr Val Gly Pro Thr Val 
            20                  25                  30          


Met Gly Trp Phe Arg Gln Ala Pro Gly Lys Lys Arg Glu Phe Val Ala 
        35                  40                  45              


Leu Ile Gly Trp Thr Gly Gly Val Thr Ala Tyr Ala Asp Ser Val Lys 
    50                  55                  60                  


Asp Arg Phe Thr Ile Ser Arg Asp Cys Ala Glu Asn Arg Val Asp Leu 
65                  70                  75                  80  


Gln Met Asp Ser Leu Lys Pro Glu Asp Thr Ala Val Tyr Tyr Cys Ala 
                85                  90                  95      


Ala Asp Ser Asn Arg Arg Arg Tyr Tyr Gly Pro Tyr Glu Tyr Asp Ser 
            100                 105                 110         


Trp Gly Gln Gly Thr Leu Val Thr Val Ser Ser Gly Gly Gly Gly Ser 
        115                 120                 125             


Asp Lys Thr His Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu Leu Gly 
    130                 135                 140                 


Gly Pro Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu Met 
145                 150                 155                 160 


Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val Ser His 
                165                 170                 175     


Glu Asp Pro Glu Val Lys Phe Asn Trp Tyr Val Asp Gly Val Glu Val 
            180                 185                 190         


His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr Tyr 
        195                 200                 205             


Arg Val Val Ser Val Leu Thr Val Leu His Gln Asp Trp Leu Asn Gly 
    210                 215                 220                 


Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu Pro Ala Pro Ile 
225                 230                 235                 240 


Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Gln Val 
                245                 250                 255     


Tyr Thr Leu Pro Pro Tyr Arg Glu Glu Met Thr Lys Asn Gln Val Ser 
            260                 265                 270         


Leu Tyr Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val Glu 
        275                 280                 285             


Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr Pro Pro 
    290                 295                 300                 


Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Tyr Ser Lys Leu Thr Val 
305                 310                 315                 320 


Asp Lys Ser Arg Trp Gln Gln Gly Asn Val Phe Ser Cys Ser Val Met 
                325                 330                 335     


His Glu Ala Leu His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu Ser 
            340                 345                 350         


Pro Gly Lys 
        355 


<210>  122
<211>  472
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 2 sequence of CD38/CD3 BsAb in BiSpecific-V2 
       format

<400>  122

Gln Val Gln Leu Gln Gln Ser Gly Ala Glu Leu Ala Arg Pro Gly Ala 
1               5                   10                  15      


Ser Val Lys Met Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Ser Tyr 
            20                  25                  30          


Thr Met His Trp Val Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile 
        35                  40                  45              


Gly Tyr Ile Asn Pro Ser Ser Gly Tyr Thr Lys Tyr Asn Gln Lys Phe 
    50                  55                  60                  


Lys Asp Lys Ala Thr Leu Thr Ala Asp Lys Ser Ser Ser Thr Ala Tyr 
65                  70                  75                  80  


Met Gln Leu Ser Ser Leu Thr Ser Glu Asp Ser Ala Val Tyr Tyr Cys 
                85                  90                  95      


Ala Arg Trp Gln Asp Tyr Asp Val Tyr Phe Asp Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Thr Leu Thr Val Ser Ser Gly Gly Gly Gly Ser Gly Gly Gly Gly 
        115                 120                 125             


Ser Gly Gly Gly Gly Ser Gln Ile Val Leu Ser Gln Ser Pro Ala Ile 
    130                 135                 140                 


Leu Ser Ala Ser Pro Gly Glu Lys Val Thr Met Thr Cys Arg Ala Ser 
145                 150                 155                 160 


Ser Ser Val Ser Tyr Met His Trp Tyr Gln Gln Lys Pro Gly Ser Ser 
                165                 170                 175     


Pro Lys Pro Trp Ile Tyr Ala Ala Ser Asn Arg Ala Ser Gly Val Pro 
            180                 185                 190         


Ala Arg Phe Ser Gly Ser Gly Ser Gly Thr Ser Tyr Ser Leu Thr Ile 
        195                 200                 205             


Ser Arg Val Glu Ala Glu Asp Ala Ala Thr Tyr Tyr Cys Gln Gln Trp 
    210                 215                 220                 


Ser Ser Asn Pro Pro Thr Phe Gly Gly Gly Thr Lys Leu Glu Thr Lys 
225                 230                 235                 240 


Gly Gly Gly Gly Ser Asp Lys Thr His Thr Cys Pro Pro Cys Pro Ala 
                245                 250                 255     


Pro Glu Leu Leu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro Lys Pro 
            260                 265                 270         


Lys Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val 
        275                 280                 285             


Val Asp Val Ser His Glu Asp Pro Glu Val Lys Phe Asn Trp Tyr Val 
    290                 295                 300                 


Asp Gly Val Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln 
305                 310                 315                 320 


Tyr Asn Ser Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu His Gln 
                325                 330                 335     


Asp Trp Leu Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys Ala 
            340                 345                 350         


Leu Pro Ala Pro Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln Pro 
        355                 360                 365             


Arg Glu Pro Glu Val Tyr Thr Leu Pro Pro Ser Arg Glu Glu Met Thr 
    370                 375                 380                 


Lys Asn Gln Val Ser Leu Thr Cys Leu Val Lys Gly Phe Tyr Pro Ser 
385                 390                 395                 400 


Asp Ile Ala Val Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr 
                405                 410                 415     


Lys Thr Thr Pro Pro Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Thr 
            420                 425                 430         


Ser Lys Leu Thr Val Asp Lys Ser Arg Trp Gln Gln Gly Asn Val Phe 
        435                 440                 445             


Ser Cys Ser Val Met His Glu Ala Leu His Asn His Tyr Thr Gln Lys 
    450                 455                 460                 


Ser Leu Ser Leu Ser Pro Gly Lys 
465                 470         


<210>  123
<211>  472
<212>  PRT
<213>  Artificial

<220>
<223>  Exemplary chain 2 sequence of CD38/CD3 BsAb in BiSpecific-V2 
       format

<400>  123

Gln Val Gln Leu Gln Gln Ser Gly Ala Glu Leu Ala Arg Pro Gly Ala 
1               5                   10                  15      


Ser Val Lys Met Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Ser Tyr 
            20                  25                  30          


Thr Met His Trp Val Lys Gln Arg Pro Gly Gln Gly Leu Glu Trp Ile 
        35                  40                  45              


Gly Tyr Ile Asn Pro Ser Ser Gly Tyr Thr Lys Tyr Asn Gln Lys Phe 
    50                  55                  60                  


Lys Asp Lys Ala Thr Leu Thr Ala Asp Lys Ser Ser Ser Thr Ala Tyr 
65                  70                  75                  80  


Met Gln Leu Ser Ser Leu Thr Ser Glu Asp Ser Ala Val Tyr Tyr Cys 
                85                  90                  95      


Ala Arg Trp Gln Asp Tyr Asp Val Tyr Phe Asp Tyr Trp Gly Gln Gly 
            100                 105                 110         


Thr Thr Leu Thr Val Ser Ser Gly Gly Gly Gly Ser Gly Gly Gly Gly 
        115                 120                 125             


Ser Gly Gly Gly Gly Ser Gln Ile Val Leu Ser Gln Ser Pro Ala Ile 
    130                 135                 140                 


Leu Ser Ala Ser Pro Gly Glu Lys Val Thr Met Thr Cys Arg Ala Ser 
145                 150                 155                 160 


Ser Ser Val Ser Tyr Met His Trp Tyr Gln Gln Lys Pro Gly Ser Ser 
                165                 170                 175     


Pro Lys Pro Trp Ile Tyr Ala Ala Ser Asn Arg Ala Ser Gly Val Pro 
            180                 185                 190         


Ala Arg Phe Ser Gly Ser Gly Ser Gly Thr Ser Tyr Ser Leu Thr Ile 
        195                 200                 205             


Ser Arg Val Glu Ala Glu Asp Ala Ala Thr Tyr Tyr Cys Gln Gln Trp 
    210                 215                 220                 


Ser Ser Asn Pro Pro Thr Phe Gly Gly Gly Thr Lys Leu Glu Thr Lys 
225                 230                 235                 240 


Glu Pro Lys Ser Cys Asp Lys Thr His Thr Cys Pro Pro Cys Pro Ala 
                245                 250                 255     


Pro Glu Leu Leu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro Lys Pro 
            260                 265                 270         


Lys Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val 
        275                 280                 285             


Val Asp Val Ser His Glu Asp Pro Glu Val Lys Phe Asn Trp Tyr Val 
    290                 295                 300                 


Asp Gly Val Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln 
305                 310                 315                 320 


Tyr Asn Ser Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu His Gln 
                325                 330                 335     


Asp Trp Leu Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys Ala 
            340                 345                 350         


Leu Pro Ala Pro Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln Pro 
        355                 360                 365             


Arg Glu Pro Glu Val Tyr Thr Leu Pro Pro Ser Arg Glu Glu Met Thr 
    370                 375                 380                 


Lys Asn Gln Val Ser Leu Thr Cys Leu Val Lys Gly Phe Tyr Pro Ser 
385                 390                 395                 400 


Asp Ile Ala Val Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr 
                405                 410                 415     


Lys Thr Thr Pro Pro Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Thr 
            420                 425                 430         


Ser Lys Leu Thr Val Asp Lys Ser Arg Trp Gln Gln Gly Asn Val Phe 
        435                 440                 445             


Ser Cys Ser Val Met His Glu Ala Leu His Asn His Tyr Thr Gln Lys 
    450                 455                 460                 


Ser Leu Ser Leu Ser Pro Gly Lys 
465                 470         


<210>  124
<211>  20
<212>  PRT
<213>  Artificial

<220>
<223>  Linker peptide

<400>  124

Gly Gly Gly Gly Ser Gly Gly Gly Gly Ser Gly Gly Gly Gly Ser Gly 
1               5                   10                  15      


Gly Gly Gly Ser 
            20  


<210>  125
<211>  24
<212>  PRT
<213>  Artificial

<220>
<223>  Linker peptide

<400>  125

Gly Gly Gly Gly Ser Gly Gly Gly Gly Ser Gly Gly Gly Gly Ser Gly 
1               5                   10                  15      


Gly Gly Gly Ser Gly Gly Gly Gly 
            20                  


<210>  126
<211>  30
<212>  PRT
<213>  Artificial

<220>
<223>  Linker peptide

<400>  126

Gly Gly Gly Gly Ser Gly Gly Gly Gly Ser Gly Gly Gly Gly Ser Gly 
1               5                   10                  15      


Gly Gly Gly Ser Gly Gly Gly Gly Ser Gly Gly Gly Gly Ser 
            20                  25                  30  


