title: Characterization of the beta-galactosidase from a lactose-negative, complementing mutant of Escherichia coli K12.
mesh_terms: D002499:Centrifugation, Density Gradient; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D004586:Electrophoresis; D004926:Escherichia coli / Q000201:enzymology*; D005696:Galactosidases / Q000032:analysis*; D007118:Immunoassay; D005779:Immunodiffusion; D008970:Molecular Weight; D009154:Mutation; D014461:Ultracentrifugation
chemical_list: D005696:Galactosidases