Platelet related growth regulator

摘要

Novel polypeptide compositions are provided which inhibit human tumor cell growth, which may or may not stimulate autophosphorylation of pp60 src and induce the release of a 52 kDal polypeptide from neoplastic cells. Individual polypeptides may be isolated from mammalian blood platelets by selected extraction and purification procedures, may be synthesized or produced by hybrid DNA technology.