In {HEAD ~ other words}, the conjugate according to the invention is preferably a conjugate, wherein the amino acid sequence of the polypeptide differs from {TAIL ~ SEQ ID} NO:1 in that at least one naturally occurring N X′ X sequence is substituted with a N X′ S or N X′ T sequence, wherein X′ is any amino acid except P, and X is any amino acid except for S and T 
In { HEAD ~ other words } , the conjugate according to the invention is preferably a conjugate , wherein the amino acid sequence of the polypeptide differs from { TAIL ~ SEQ ID } NO:1 in that at least one naturally occurring N X′ X sequence is substituted with a N X′ S or N X′ T sequence , wherein X′ is any amino acid except P , and X is any amino acid except for S and T
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