Identification of the specificity of isolated phage display single-chain antibodies using yeast two-hybrid screens

Nicolaj Rasmussen1, Henrik J Ditzel

  • 1Institute of Medical Biology, University of Southern Denmark, Winsloewparken 25, 3, DK-5000, Odense, Denmark.

A method is described for the identification of the antigen recognised by an scFv isolated from an antibody phage display library using selection against a complex mixture of proteins (e.g. intact cells, purified cell surface membranes, and tissue sections). The method takes advantage of a yeast two-hybrid system that additionally allows for reorganization of post-translational modifications to the bait and target proteins. This technique is therefore especially useful for identifying surface-expressed antigens.