title: Biochemical evidence that the operator locus is distinct from the z gene in the lac operon of Escherichia coli.
mesh_terms: D000595:Amino Acid Sequence; D002874:Chromosome Mapping; D004926:Escherichia coli / Q000378:metabolism*; D005696:Galactosidases / Q000096:biosynthesis; D005796:Genes; D008967:Molecular Biology; D009154:Mutation; D009876:Operon
chemical_list: D005696:Galactosidases