Repressor ProteinsOperator Regions, GeneticNucleotidesMolecular Sequence DataLac RepressorsBase SequenceAmino Acid SequenceTranscription FactorsDNA-Binding ProteinsEscherichia coliBacterial ProteinsTranscription, GeneticOperonPromoter Regions, GeneticBinding SitesIsopropyl ThiogalactosideProtein BindingCloning, MolecularMutationPlasmidsGene Expression Regulation, BacterialViral Regulatory and Accessory ProteinsDNAGenes, RegulatorDNA, BacterialGenes, BacterialEscherichia coli ProteinsPolymorphism, Single NucleotideAdenine NucleotidesNucleic Acid ConformationGene Expression RegulationSequence Homology, Nucleic AcidRNA, MessengerGuanine NucleotidesRestriction MappingRecombinant Fusion ProteinsBacteriophage lambdaLac OperonZinc FingersNuclear ProteinsLysogenySequence Homology, Amino AcidViral ProteinsPurine NucleotidesSequence AlignmentSequence Analysis, DNAKineticsRegulatory Sequences, Nucleic AcidGenesCell LineDNA FootprintingProtein BiosynthesisLactoseProtein Structure, TertiaryConsensus SequenceProtein ConformationModels, MolecularTrans-ActivatorsEnzyme RepressionMutagenesis, Site-DirectedHistone DeacetylasesColiphagesCarrier ProteinsElectrophoretic Mobility Shift AssayDNA, ViralTransfectionDNA PrimersTetracyclineModels, GeneticRecombinant ProteinsDeoxyribonuclease ISaccharomyces cerevisiaeGenes, ReporterDimerizationTwo-Hybrid System TechniquesNucleotides, CyclicOpen Reading FramesHeLa CellsGuanine Nucleotide Exchange Factorsbeta-GalactosidaseDrosophila ProteinsGene Expression Regulation, FungalPolymerase Chain ReactionPyrimidine NucleotidesMutagenesisPhenotypeCell NucleusGenes, ViralDNA Transposable ElementsSaccharomyces cerevisiae ProteinsSequence DeletionStructure-Activity RelationshipHomeodomain ProteinsGenetic Complementation TestGene Expression Regulation, DevelopmentalBasic Helix-Loop-Helix Transcription FactorsRNA-Binding ProteinsBacillus subtilisAdenosine TriphosphatePhylogeny