title: [Isolation of mutant strains having abnormal repressors of the lactose catabolizing operaon].
mesh_terms: D001419:Bacteria / Q000302:isolation & purification*; D001431:Bacteriological Techniques; D002874:Chromosome Mapping; D004926:Escherichia coli; D005696:Galactosidases / Q000378:metabolism; D005809:Genes, Regulator; D005827:Genetics, Microbial; D007785:Lactose / Q000378:metabolism*; D009154:Mutation; D009876:Operon
chemical_list: D005696:Galactosidases; D007785:Lactose