Compositions comprising polypeptides

Details Compositions comprising polypeptides Compositions comprising polypeptides

A - Human Necessities

61

K

A61K 39/395 (2006.01) C07K 16/28 (2006.01) C07K 16/46 (2006.01)

Patent

CA 2544532

The present invention relates to compositions comprising polypeptides, especially polypeptides capable of specifically binding predetermined antigens. The polypeptide in the composition comprises at least two antigen binding sites. These at least two antigen binding sites are located on a single polypeptide chain. One of the at least two antigen binding sites specifically binds the human CD3 antigen. The polypeptide may exist in both monomeric form and multimeric form. The multimeric form of the polypeptide constitutes no more than 5% of the total weight of the combined monomeric and multimeric forms of said polypeptide.

L'invention porte sur des compositions qui renferment des polypeptides, en particulier des polypeptides capables de se lier spécifiquement à des antigènes prédéterminés. Le polypeptide de la composition comprend au moins deux sites de liaison d'antigène. Ces deux sites de liaison d'antigène sont situés sur une seule chaîne polypeptidique. L'un des deux sites de liaison précités lie spécifiquement l'antigène CD3 humain. Le polypeptide peut exister sous la forme monomère et sous la forme multimère. La forme multimère du polypeptide ne constitue pas plus de 5 % du poids total des formes monomère et multimère combinées dudit polypeptide.

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