title: Sequence analysis of operator constitutive mutants of the tryptophan operon of Escherichia coli.
mesh_terms: D001483:Base Sequence; D004269:DNA, Bacterial; D004586:Electrophoresis; D004926:Escherichia coli / Q000235:genetics*; D009154:Mutation; D009876:Operon; D014364:Tryptophan
chemical_list: D004269:DNA, Bacterial; D014364:Tryptophan