Lac OperonOperonbeta-GalactosidaseLactoseLac RepressorsGalactosidasesEscherichia coliGenes, BacterialGene Expression Regulation, BacterialIsopropyl ThiogalactosideBase SequenceBacterial ProteinsEnzyme RepressionMolecular Sequence DataNitrophenylgalactosidesTranscription, GeneticMutationGenes, RegulatorPlasmidsPromoter Regions, GeneticEscherichia coli ProteinsDNA, BacterialMolecular BiologyCloning, MolecularRepressor ProteinsrRNA OperonOperator Regions, GeneticRNA, BacterialCyclic AMP Receptor ProteinThiogalactosidesChromosomes, BacterialGenesDNA Transposable ElementsDNA, RecombinantGenetics, MicrobialTransduction, GeneticRestriction MappingAmino Acid SequenceBacteriophage muGenetic VectorsEnzyme InductionSalmonella typhimuriumGenes, ReporterGalactoseColiphagesChromosome MappingBacillus subtilisGalactosidesMutagenesis, InsertionalMembrane Transport ProteinsRNA, MessengerRecombinant Fusion ProteinsGene Expression RegulationGenetic CodeGlycosidesRecombination, GeneticDNA-Directed RNA PolymerasesModels, GeneticNucleic Acid ConformationGene Transfer TechniquesGenetic Complementation TestTranscription FactorsGene ExpressionDNA Restriction EnzymesSpecies SpecificityPhenotypeCulture MediaKineticsMice, TransgenicMutagenesisStochastic ProcessesSequence Analysis, DNAGlucoseBacteriophage lambdaDNA-Binding ProteinsSequence Homology, Nucleic AcidRegulatory Sequences, Nucleic AcidProtein BiosynthesisOpen Reading FramesArtificial Gene FusionSigma FactorLactose FactorsGenetic TherapyTransgenesGene DeletionCyclic AMPBlotting, SouthernSpores, BacterialLysogenyGenes, FungalSequence Homology, Amino AcidTransformation, GeneticCodonSaccharomyces cerevisiaeBinding SitesMultigene FamilyArabinoseTransfectionTrans-ActivatorsRegulon