Multivalent and multispecific binding proteins, their manufacture and use

摘要

PCT No. PCT/GB93/02492 Sec. 371 Date May 14, 1996 Sec. 102(e) Date May 14, 1996 PCT Filed Dec. 3, 1993 PCT Pub. No. WO94/13804 PCT Pub. Date Jun. 23, 1994Polypeptides comprising a first domain, which comprises a binding region of an immunoglobulin heavy chain variable region, and a second domain, which comprises a binding region of an immunoglobulin light chain variable region, the domains being linked but incapable of associating with each other to form an antigen binding site, associate to form antigen binding multimers, such as dimers, which may be multivalent or have multispecificity. The domains may be linked by a short peptide linker or may be joined directly together. Bispecific dimers may have longer linkers. Methods of preparation of the polypeptides and multimers and diverse repertoires thereof, and their display on the surface of bacteriophage for easy selection of binders of interest, are disclosed, along with many utilities.