Repressor ProteinsTranscription FactorsTranscription, GeneticMolecular Sequence DataPromoter Regions, GeneticDNA-Binding ProteinsBase SequencePeptidesOperator Regions, GeneticAmino Acid SequenceBinding SitesProtein BindingLac RepressorsGene Expression RegulationHistone DeacetylasesMutationNuclear ProteinsZinc FingersBasic-Leucine Zipper Transcription FactorsCell LineRNA, MessengerBacterial ProteinsTranscriptional ActivationHomeodomain ProteinsEscherichia coliBasic Helix-Loop-Helix Transcription FactorsOperonRecombinant Fusion ProteinsTransfectionMafK Transcription FactorGene Expression Regulation, BacterialGenes, ReporterHeLa CellsProtein Structure, TertiarySequence Homology, Amino AcidCell NucleusPlasmidsSignal TransductionDNATrans-ActivatorsGenes, RegulatorCloning, MolecularCell DifferentiationIsopropyl ThiogalactosideCell Line, TumorViral Regulatory and Accessory ProteinsDown-RegulationPeptide FragmentsSp1 Transcription FactorEscherichia coli ProteinsDNA, BacterialRegulatory Sequences, Nucleic AcidGene Expression Regulation, DevelopmentalGenes, BacterialElectrophoretic Mobility Shift AssayLac OperonDNA FootprintingPeptide LibraryCells, CulturedGene Expression Regulation, FungalSequence AlignmentRecombinant ProteinsKineticsSaccharomyces cerevisiaeRestriction MappingConsensus SequenceBacteriophage lambdaProtein ConformationDrosophila ProteinsModels, MolecularCarrier ProteinsSaccharomyces cerevisiae ProteinsTranscription Initiation SiteReverse Transcriptase Polymerase Chain ReactionLysogenyMutagenesis, Site-DirectedGene ExpressionProtein BiosynthesisAntimicrobial Cationic PeptidesKruppel-Like Transcription FactorsEnhancer Elements, GeneticModels, Geneticbeta-GalactosidaseDeoxyribonuclease IChromatin ImmunoprecipitationDimerizationModels, BiologicalTwo-Hybrid System TechniquesSequence Homology, Nucleic AcidPhosphorylationPeptides, CyclicNucleic Acid ConformationBlotting, WesternDrosophilaGenesStructure-Activity RelationshipTranscription Factor AP-1PhenotypeViral ProteinsSequence Deletion