title: Regulation of newly evolved enzymes. II. The ebg repressor.
abstract: The ebg (evolved beta-galactosidase) regulatory locus has been mapped. The map order is argG-ebgA-ebgR-tolC-metC, and there is 1.6% recombination between ebgR and ebgA. Studies with ebgR-/ebgR+ merdiploids have shown that ebgR- is recessive, and it is concluded that the synthesis of ebg enzyme is under negative control.
mesh_terms: D002874:Chromosome Mapping; D002876:Chromosomes, Bacterial; D004926:Escherichia coli; D005696:Galactosidases; D005808:Genes, Recessive; D005809:Genes, Regulator
chemical_list: D005696:Galactosidases