HIGH THROUGHPUT SCREEN FOR BIOLOGICALLY ACTIVE POLYPEPTIDES

Methods for screening libraries of polypeptides for biologically activity on cells. For example, polypeptides can be synthesized and encapsulated along with their coding sequences in microcapsules of an emulsion. Emulsion microcapsules can then be fused with microcapsules comprising test cells and biological activity on the cells is assessed to identify biologically active polypeptides and nucleic acid molecules encoding the same.