               SEQUENCE LISTING

<110> Synthon Biopharmaceuticals B.V.
      COUMANS Rudy Gerardus Elisabeth

<120> DUAL CONJUGATION PROCESS FOR PREPARING ANTIBODY-DRUG CONJUGATES

<130> P1716PC00

<160> 4

<170> BiSSAP 1.3

<210> 1
<211> 121
<212> PRT
<213> Artificial Sequence

<220> 
<223> HCVR anti-5T4 antibody 41C

<400> 1
Glu Val Gln Leu Val Glu Ser Gly Gly Asp Leu Ala Gln Pro Gly Gly 
1               5                   10                  15      
Ser Leu Arg Leu Ser Cys Ala Val Ser Gly Ile Asp Leu Ser Ser Tyr 
            20                  25                  30          
Gly Met Gly Trp Val Arg Gln Ala Cys Gly Lys Gly Leu Glu Trp Val 
        35                  40                  45              
Ser Ile Ile Ser Arg Asn Ser Val Thr Tyr Tyr Ala Thr Trp Ala Lys 
    50                  55                  60                  
Gly Arg Phe Thr Ile Ser Arg Asp Asn Ser Lys Asn Thr Val Tyr Leu 
65                  70                  75                  80  
Gln Met Thr Ser Leu Arg Ala Glu Asp Thr Ala Leu Tyr Phe Cys Ala 
                85                  90                  95      
Arg Arg Ala Thr Tyr Ser Gly Ala Leu Gly Tyr Phe Asp Ile Trp Gly 
            100                 105                 110         
Gln Gly Thr Leu Val Thr Val Ser Ser 
        115                 120     

<210> 2
<211> 110
<212> PRT
<213> Artificial Sequence

<220> 
<223> LCVR anti-5T4 antibody

<400> 2
Glu Ile Val Met Thr Gln Ser Pro Ser Ser Leu Ser Ala Ser Val Gly 
1               5                   10                  15      
Asp Arg Val Thr Ile Thr Cys Gln Ala Ser Glu Asn Ile Tyr Ser Thr 
            20                  25                  30          
Leu Ala Trp Tyr Gln Gln Lys Pro Gly Lys Ala Pro Lys Leu Leu Ile 
        35                  40                  45              
Tyr Asp Ala Phe Asp Leu Ala Ser Gly Val Pro Ser Arg Phe Ser Gly 
    50                  55                  60                  
Ser Gly Ser Gly Thr Asp Tyr Thr Leu Thr Ile Ser Ser Leu Gln Pro 
65                  70                  75                  80  
Glu Asp Phe Ala Thr Tyr Tyr Cys Gln Gln Gly Tyr Ser Gly Thr Asn 
                85                  90                  95      
Val Asp Asn Ala Phe Gly Gln Gly Thr Lys Leu Glu Ile Lys 
            100                 105                 110 

<210> 3
<211> 19
<212> PRT
<213> Artificial Sequence

<220> 
<223> HC rabbit leader sequence

<400> 3
Met Gly Trp Thr Leu Val Phe Leu Phe Leu Leu Ser Val Thr Ala Gly 
1               5                   10                  15      
Val His Ser 
            

<210> 4
<211> 20
<212> PRT
<213> Artificial Sequence

<220> 
<223> LC rabbit leader sequence

<400> 4
Met Val Ser Ser Ala Gln Phe Leu Gly Leu Leu Leu Leu Cys Phe Gln 
1               5                   10                  15      
Gly Thr Arg Cys 
            20  

