title: Beef extract mutagens, and not liver S9, increase mutation frequency in the Ames test.
mesh_terms: D000818:Animals; D001711:Biotransformation; D002417:Cattle; D003296:Cooking; D008460:Meat / Q000032:analysis*; D008862:Microsomes, Liver / Q000378:metabolism; D009152:Mutagenicity Tests; D009153:Mutagens / Q000302:isolation & purification* / Q000494:pharmacology; D009154:Mutation; D012486:Salmonella typhimurium / Q000187:drug effects
chemical_list: D009153:Mutagens