Repressor ProteinsOperator Regions, GeneticLac RepressorsBase SequenceTranscription FactorsAmino Acid SequenceMolecular Sequence DataDNA-Binding ProteinsBacterial ProteinsTranscription, GeneticOperonEscherichia coliPromoter Regions, GeneticIsopropyl ThiogalactosideProtein BindingBinding SitesGene Expression Regulation, BacterialViral Regulatory and Accessory ProteinsDNAPlasmidsGenes, RegulatorMutationDNA, ComplementaryEscherichia coli ProteinsRNA, MessengerDNA, BacterialGene Expression RegulationRecombinant Fusion ProteinsZinc FingersBacteriophage lambdaLysogenyLac OperonGenes, BacterialCloning, MolecularNuclear ProteinsRestriction MappingSequence AlignmentLactoseDNA FootprintingCell LineViral ProteinsSequence Homology, Nucleic AcidHistone DeacetylasesTransfectionEnzyme RepressionTrans-ActivatorsRegulatory Sequences, Nucleic AcidProtein BiosynthesisCarrier ProteinsConsensus SequenceTetracyclineRecombinant ProteinsElectrophoretic Mobility Shift AssayTwo-Hybrid System TechniquesProtein Structure, TertiaryColiphagesDeoxyribonuclease IGenesGenes, ReporterProtein ConformationGene ExpressionBlotting, NorthernMutagenesis, Site-DirectedDrosophila ProteinsGene Expression Regulation, Developmentalbeta-GalactosidaseDimerizationGene LibraryGene Expression Regulation, FungalSequence Homology, Amino AcidHomeodomain ProteinsBasic Helix-Loop-Helix Transcription FactorsDNA PrimersKineticsHeLa CellsNucleic Acid ConformationCell NucleusSaccharomyces cerevisiaeModels, MolecularModels, GeneticGenetic Complementation TestTranscriptional ActivationRNA-Binding ProteinsInsect ProteinsAlcohol OxidoreductasesDrosophilaGene SilencingDNA, ViralPhenotypeSaccharomyces cerevisiae ProteinsArabidopsis ProteinsSignal TransductionDNA Transposable ElementsMutagenesisPolymerase Chain ReactionMacromolecular SubstancesChloramphenicol O-AcetyltransferaseTryptophanGenetic VectorsReverse Transcriptase Polymerase Chain Reaction