Repressor ProteinsOperator Regions, GeneticEscherichia coli ProteinsEscherichia coliLac RepressorsBacterial ProteinsBase SequenceMolecular Sequence DataTranscription FactorsOperonDNA-Binding ProteinsAmino Acid SequenceTranscription, GeneticPromoter Regions, GeneticIsopropyl ThiogalactosideGene Expression Regulation, BacterialEscherichia coli InfectionsPlasmidsBinding SitesProtein BindingGenes, BacterialMutationDNA, BacterialViral Regulatory and Accessory ProteinsGenes, RegulatorCloning, MolecularEscherichia coli O157Bacteriophage lambdaLysogenyLac OperonRecombinant Fusion ProteinsDNAGene Expression RegulationZinc FingersColiphagesLactoseRestriction MappingNuclear ProteinsSequence Homology, Amino AcidEnzyme RepressionDNA FootprintingRecombinant ProteinsKineticsViral ProteinsEscherichia coli K12TetracyclineTrans-ActivatorsRNA, MessengerCarrier ProteinsProtein Conformationbeta-GalactosidaseMutagenesis, Site-DirectedRegulatory Sequences, Nucleic AcidHistone DeacetylasesProtein Structure, TertiarySequence AlignmentProtein BiosynthesisGenetic Complementation TestElectrophoretic Mobility Shift AssayModels, MolecularGenesConsensus SequenceNucleic Acid ConformationDimerizationDeoxyribonuclease ICell LineGenes, ReporterRNA, BacterialTwo-Hybrid System TechniquesSequence Homology, Nucleic AcidDNA Transposable ElementsAdhesins, Escherichia coliDrosophila ProteinsTransfectionMutagenesisBacillus subtilisGene Expression Regulation, FungalPhenotypeBasic Helix-Loop-Helix Transcription FactorsElectrophoresis, Polyacrylamide GelDNA PrimersHomeodomain ProteinsSaccharomyces cerevisiaeModels, GeneticTryptophanStructure-Activity RelationshipGene Expression Regulation, DevelopmentalHeLa CellsGene ExpressionAlcohol OxidoreductasesSequence Analysis, DNACell NucleusModels, BiologicalMacromolecular SubstancesDNA, ViralTranscriptional ActivationRNA-Binding ProteinsSequence DeletionSaccharomyces cerevisiae ProteinsMembrane Transport Proteins