GA-Binding Protein Transcription FactorTranscription FactorsTranscription, GeneticMolecular Sequence DataDNA-Binding ProteinsBase SequenceBinding SitesPromoter Regions, GeneticAmino Acid SequenceProtein BindingSp1 Transcription FactorGene Expression RegulationAffinity LabelsCell LineMacromolecular SubstancesTranscriptional ActivationTrans-ActivatorsRNA, MessengerNuclear ProteinsMyosin-Light-Chain PhosphataseBasic Helix-Loop-Helix Transcription FactorsTranscription Factor AP-1Repressor ProteinsCloning, MolecularMutationDNASignal TransductionSequence Homology, Amino AcidForkhead Transcription FactorsHomeodomain ProteinsGene Expression Regulation, DevelopmentalProtein SubunitsAzidesProtein Structure, Tertiary