title: Insertion mutations in the control region of the galactose operon of E. coli. II. Physical characterization of the mutations.
mesh_terms: D002499:Centrifugation, Density Gradient; D003090:Coliphages; D004269:DNA, Bacterial; D004926:Escherichia coli; D005690:Galactose; D005796:Genes; D005827:Genetics, Microbial; D005838:Genotype; D008854:Microscopy, Electron; D008967:Molecular Biology; D009154:Mutation; D009876:Operon; D014161:Transduction, Genetic
chemical_list: D004269:DNA, Bacterial; D005690:Galactose