title: Mutations creating internal promoter elements in the tryptophan operon of Salmonella typhimurium.
mesh_terms: D002876:Chromosomes, Bacterial; D005815:Genetic Code; D006358:Hot Temperature; D008967:Molecular Biology; D009154:Mutation; D009876:Operon; D011995:Recombination, Genetic; D012486:Salmonella typhimurium; D014161:Transduction, Genetic; D014364:Tryptophan
chemical_list: D014364:Tryptophan