title: The nature of mutants in the lac promoter region.
mesh_terms: D004926:Escherichia coli / Q000528:radiation effects; D005696:Galactosidases / Q000096:biosynthesis; D005809:Genes, Regulator; D007785:Lactose; D026901:Membrane Transport Proteins / Q000096:biosynthesis; D009154:Mutation; D009876:Operon; D011831:Radiation Genetics; D014161:Transduction, Genetic; D014466:Ultraviolet Rays
chemical_list: D026901:Membrane Transport Proteins; D005696:Galactosidases; D007785:Lactose