Repressor ProteinsOperator Regions, GeneticLac RepressorsMolecular Sequence DataTranscription FactorsDNA-Binding ProteinsBase SequenceBacterial ProteinsOperonIsopropyl ThiogalactosideTranscription, GeneticEscherichia coliPromoter Regions, GeneticAmino Acid SequenceViral Regulatory and Accessory ProteinsProtein BindingGene Expression Regulation, BacterialBinding SitesGenes, RegulatorPlasmidsMutationEscherichia coli ProteinsDNA, BacterialDNALysogenyLac OperonZinc FingersGenes, BacterialBacteriophage lambdaCloning, MolecularGene Expression RegulationRecombinant Fusion ProteinsNuclear ProteinsLactoseDNA FootprintingHistone DeacetylasesEnzyme RepressionViral ProteinsTrans-ActivatorsRegulatory Sequences, Nucleic AcidTetracyclineRNA, MessengerElectrophoretic Mobility Shift AssayRestriction MappingColiphagesConsensus SequenceDeoxyribonuclease ITwo-Hybrid System TechniquesProtein Structure, TertiaryGenes, ReporterDimerizationCell LineProtein BiosynthesisCarrier ProteinsDrosophila ProteinsSequence Homology, Amino AcidProtein ConformationMutagenesis, Site-Directedbeta-GalactosidaseGene Expression Regulation, FungalTransfectionBasic Helix-Loop-Helix Transcription FactorsSequence AlignmentHomeodomain ProteinsGene Expression Regulation, DevelopmentalNucleic Acid ConformationModels, MolecularCell NucleusRecombinant ProteinsHeLa CellsModels, GeneticSaccharomyces cerevisiaeKineticsTranscriptional Activation