title: A mutation to 5-methyltryptophan dependence in the trp operon of Salmonella typhimurium. IV. Isolation and characterization of trp promoter mutations.
mesh_terms: D009154:Mutation; D009876:Operon; D011995:Recombination, Genetic; D012486:Salmonella typhimurium / Q000235:genetics*; D014364:Tryptophan / Q000235:genetics*
chemical_list: D014364:Tryptophan