Binding SitesMolecular Sequence DataProtein BindingBase SequenceAmino Acid SequencePromoter Regions, GeneticBinding, CompetitiveModels, MolecularTranscription FactorsKineticsDNA-Binding ProteinsProtein Structure, TertiaryProtein ConformationCell LineMutagenesis, Site-DirectedMutationDNARecombinant ProteinsLigandsSequence Homology, Amino AcidEscherichia coliRecombinant Fusion ProteinsCrystallography, X-RayTranscription, GeneticCarrier ProteinsTransfectionNuclear ProteinsGene Expression RegulationSequence AlignmentCloning, MolecularBacterial ProteinsBinding Sites, AntibodyConsensus SequenceEnhancer Elements, GeneticRepressor ProteinsDNA FootprintingRegulatory Sequences, Nucleic AcidPeptide FragmentsPlasmidsProtein Structure, SecondarySp1 Transcription FactorStructure-Activity RelationshipConserved SequenceCell MembraneHeLa CellsNucleic Acid ConformationCattleAmino Acid MotifsReceptors, Cell SurfaceCells, CulturedRNA, MessengerTrans-ActivatorsRadioligand AssayDimerizationSubstrate SpecificityMacromolecular SubstancesDNA PrimersElectrophoretic Mobility Shift AssayElectrophoresis, Polyacrylamide GelPeptidesMutagenesisProteinsChromatin ImmunoprecipitationMembrane ProteinsOligodeoxyribonucleotidesAffinity LabelsSequence DeletionCalciumGenes, ReporterTumor Cells, CulturedSpectrometry, FluorescenceModels, BiologicalSaccharomyces cerevisiaeRNA-Binding ProteinsMolecular WeightAntibodies, MonoclonalCricetinaeRabbitsAmino Acid SubstitutionSurface Plasmon ResonanceSequence Homology, Nucleic AcidSignal TransductionTranscriptional ActivationCOS CellsCell NucleusResponse ElementsAdenosine TriphosphateEscherichia coli ProteinsMolecular StructureAllosteric RegulationCross-Linking ReagentsMagnesiumHydrogen-Ion ConcentrationCHO CellsPhosphorylationIodine RadioisotopesDeoxyribonuclease IAutoradiographyPoint MutationThermodynamics