Transcription Factor TFIIIARNA, Ribosomal, 5STranscription FactorsTranscription, GeneticXenopus laevisRNA, RibosomalPromoter Regions, GeneticDNA-Binding ProteinsBase SequenceGene Expression RegulationMolecular Sequence DataSp1 Transcription FactorBinding SitesRNA, MessengerTranscriptional ActivationProtein BindingTrans-ActivatorsZinc FingersDNANuclear ProteinsCell LineAmino Acid SequenceRepressor ProteinsTranscription Factor AP-1Basic Helix-Loop-Helix Transcription FactorsSignal TransductionCell NucleusHomeodomain ProteinsGene Expression Regulation, DevelopmentalMutationTransfectionForkhead Transcription FactorsGenes, ReporterRegulatory Sequences, Nucleic AcidBasic-Leucine Zipper Transcription FactorsCells, CulturedHeLa CellsChromatin ImmunoprecipitationTranscription Factor AP-2Cell DifferentiationKruppel-Like Transcription FactorsCloning, MolecularXenopusPlasmidsNF-kappa BReverse Transcriptase Polymerase Chain ReactionTranscription Factors, TFIIDeoxyribonuclease I