Repressor ProteinsAllelesOperator Regions, GeneticLac RepressorsMolecular Sequence DataBase SequenceTranscription FactorsDNA-Binding ProteinsBacterial ProteinsOperonPromoter Regions, GeneticTranscription, GeneticEscherichia coliIsopropyl ThiogalactosideAmino Acid SequenceMutationProtein BindingGene Expression Regulation, BacterialBinding SitesViral Regulatory and Accessory ProteinsGenes, RegulatorPlasmidsEscherichia coli ProteinsDNA, BacterialDNACloning, MolecularGenes, BacterialGene Expression RegulationLac OperonZinc FingersLysogenyNuclear ProteinsBacteriophage lambdaRecombinant Fusion ProteinsGenotypePhenotypeLactoseDNA FootprintingRNA, MessengerGene FrequencyEnzyme RepressionHistone DeacetylasesViral ProteinsTrans-ActivatorsPolymorphism, GeneticRestriction MappingModels, GeneticRegulatory Sequences, Nucleic AcidTetracyclineElectrophoretic Mobility Shift AssayDrosophila ProteinsSequence Homology, Amino AcidCarrier ProteinsCell LineProtein Structure, TertiaryConsensus SequenceColiphagesGenes, ReporterSequence AlignmentDeoxyribonuclease ITwo-Hybrid System TechniquesMutagenesis, Site-DirectedProtein BiosynthesisGene Expression Regulation, DevelopmentalGene Expression Regulation, FungalDimerizationTransfectionHomeodomain ProteinsSaccharomyces cerevisiaeProtein Conformationbeta-GalactosidaseGenetic Complementation TestDNA PrimersBasic Helix-Loop-Helix Transcription FactorsPolymerase Chain ReactionSaccharomyces cerevisiae ProteinsSequence Analysis, DNAChromosome MappingPolymorphism, Single NucleotideDrosophilaModels, MolecularMutagenesisCell NucleusGenesSequence Homology, Nucleic AcidRecombinant ProteinsNucleic Acid ConformationDNA Transposable ElementsGenetic Predisposition to DiseaseGene SilencingSequence DeletionArabidopsis ProteinsHeLa CellsRNA-Binding ProteinsKineticsTranscriptional ActivationGenes, FungalSignal TransductionFungal ProteinsDrosophila melanogaster