title: The isolation and characterisation of a mutant of Salmonella typhimurium defective in mutation frequency decline.
mesh_terms: D002110:Caffeine / Q000494:pharmacology; D003470:Culture Media; D004260:DNA Repair; D005798:Genes, Bacterial; D009154:Mutation / Q000528:radiation effects; D011995:Recombination, Genetic; D012486:Salmonella typhimurium / Q000235:genetics*; D014161:Transduction, Genetic; D014364:Tryptophan; D014466:Ultraviolet Rays
chemical_list: D003470:Culture Media; D002110:Caffeine; D014364:Tryptophan