title: Identity of a claimed growth-promoting factor.
mesh_terms: D000596:Amino Acids / Q000032:analysis; D000818:Animals; D002415:Cats; D002642:Chick Embryo; D003470:Culture Media; D006133:Growth Substances / Q000032:analysis*; D008970:Molecular Weight; D009132:Muscles / Q000032:analysis; D011868:Radioisotopes; D013431:Sulfates / Q000032:analysis
chemical_list: D000596:Amino Acids; D003470:Culture Media; D006133:Growth Substances; D011868:Radioisotopes; D013431:Sulfates