Synonyms: Animalgrowth regulators, vitronectins; Animal growthsubstances, spreading factors; Complement, S-protein; Hyaluronidases,Diffusing factors and Spreading factors; Animal growth regulators, spreadingfactors; Animal growth substances, vitronectins;Complement S-protein; Epibolins; Glycoproteins,epibolins; Glycoproteins, vitronectins; Proteins, spreading factors; Proteins, vitronectins; S protein; S protein (complement); S protein(vitronectin); Spreading factor; Vitronectins