Repressor ProteinsOperator Regions, GeneticLac RepressorsMolecular Sequence DataBase SequenceTranscription FactorsBacterial ProteinsDNA-Binding ProteinsEscherichia coliOperonTranscription, GeneticPromoter Regions, GeneticIsopropyl ThiogalactosideAmino Acid SequenceGene Expression Regulation, BacterialProtein BindingBinding SitesViral Regulatory and Accessory ProteinsGenes, RegulatorMutationPlasmidsDNA, BacterialEscherichia coli ProteinsGenes, BacterialCloning, MolecularDNAGene Expression RegulationLysogenyZinc FingersLac OperonBacteriophage lambdaRecombinant Fusion ProteinsNuclear ProteinsLactoseDNA FootprintingEnzyme RepressionHistone DeacetylasesViral ProteinsTrans-ActivatorsRNA, MessengerSequence Homology, Amino AcidTetracyclineRegulatory Sequences, Nucleic AcidSequence AlignmentRestriction MappingProtein Structure, TertiaryElectrophoretic Mobility Shift AssayDrosophila ProteinsConsensus SequenceColiphagesCarrier ProteinsCell LineTwo-Hybrid System TechniquesDeoxyribonuclease IGenes, ReporterProtein BiosynthesisGene Expression Regulation, FungalProtein ConformationDimerizationModels, GeneticGene Expression Regulation, DevelopmentalMutagenesis, Site-DirectedSaccharomyces cerevisiaeModels, Biologicalbeta-GalactosidaseModels, MolecularSequence Analysis, DNATransfectionPhenotypeBasic Helix-Loop-Helix Transcription FactorsHomeodomain ProteinsNucleic Acid ConformationSequence Homology, Nucleic AcidKineticsRecombinant ProteinsCell NucleusDrosophilaSaccharomyces cerevisiae ProteinsHeLa CellsSignal TransductionGenetic Complementation TestBacillus subtilisDNA Transposable ElementsArabidopsis ProteinsGene SilencingTranscriptional ActivationDNA PrimersRNA-Binding ProteinsAlcohol OxidoreductasesDrosophila melanogasterMutagenesisInsect ProteinsGenesFungal ProteinsTryptophanArabidopsisRNA, BacterialGene ExpressionStructure-Activity RelationshipGenes, Fungal