title: A NEW METHOD FOR THE SELECTION OF MUTANTS OF ESCHERICHIA COLI FORMING BETA-GALACTOSIDASE CONSTITUTIVELY.
mesh_terms: D001431:Bacteriological Techniques; D001669:Biochemical Phenomena; D001671:Biochemistry; D004926:Escherichia coli; D005696:Galactosidases; D009154:Mutation; D012106:Research; D001616:beta-Galactosidase
chemical_list: D005696:Galactosidases; D001616:beta-Galactosidase
keywords: BACTERIOLOGICAL TECHNICS; BIOCHEMISTRY; ESCHERICHIA COLI; EXPERIMENTAL LAB STUDY; GALACTOSIDASE; MUTATION