title: Genetic regulation of the constitutive D-ribose operon in Escherichia coli B/r.
abstract: Merodiploid complementation analysis of the constitutive synthesis of the D-ribokinase and the D-ribose permease in Escherichia coli B/r has shown that the constitutive D-ribose operon is genetically controlled by a transdominant regulatory gene closely linked to the D-ribokinase and D-ribose permease structural genes. The regulatory mechanism for this operon shows no requirement for operator-repressor interaction, rather a truly positive control mechanism and thus suggests an extension of the operon model in its application to constitutive enzyme regulation in bacteria.
mesh_terms: D002874:Chromosome Mapping; D004171:Diploidy; D004926:Escherichia coli / Q000378:metabolism*; D005799:Genes, Dominant; D005809:Genes, Regulator; D005816:Genetic Complementation Test; D005838:Genotype; D007700:Kinetics; D026901:Membrane Transport Proteins / Q000378:metabolism; D009876:Operon; D010770:Phosphotransferases / Q000378:metabolism; D012266:Ribose / Q000096:biosynthesis*; D013045:Species Specificity
chemical_list: D026901:Membrane Transport Proteins; D012266:Ribose; D010770:Phosphotransferases