title: Nucleotide sequence of the promoter--operator region of the tryptophan operon of Salmonella typhimurium.
mesh_terms: D001483:Base Sequence; D004269:DNA, Bacterial; D004586:Electrophoresis; D009876:Operon; D012486:Salmonella typhimurium / Q000235:genetics*; D014364:Tryptophan
chemical_list: D004269:DNA, Bacterial; D014364:Tryptophan