title: Appearance of double mutants in aged cultures of Salmonella typhimurium cysteine-requiring strains.
mesh_terms: D000375:Aging; D003470:Culture Media; D003545:Cysteine / Q000378:metabolism; D009154:Mutation; D012486:Salmonella typhimurium; D014161:Transduction, Genetic
chemical_list: D003470:Culture Media; D003545:Cysteine