DimerizationProtein MultimerizationProtein Structure, TertiaryMolecular Sequence DataAmino Acid SequenceModels, MolecularProtein Structure, QuaternaryProtein BindingBinding SitesProtein ConformationLeucine ZippersCrystallography, X-RayMutationProtein Structure, SecondaryDNA-Binding ProteinsMutagenesis, Site-DirectedBase SequenceRecombinant Fusion ProteinsCell LineBiopolymersSequence Homology, Amino AcidRecombinant ProteinsAmino Acid SubstitutionCross-Linking ReagentsTranscription FactorsCOS CellsMacromolecular SubstancesAmino Acid MotifsStructure-Activity RelationshipDisulfidesProtein Interaction Domains and MotifsLigandsCysteineUltracentrifugationDNAKineticsTransfectionFluorescence Resonance Energy TransferProtein FoldingSignal TransductionPhosphorylationSequence DeletionSequence AlignmentEscherichia coliCircular DichroismMutagenesisMutant ProteinsBacterial ProteinsChromatography, GelHelix-Loop-Helix MotifsNucleic Acid ConformationPoint MutationRNA, ViralGlycophorinTwo-Hybrid System TechniquesRepressor ProteinsConserved SequenceBasic-Leucine Zipper Transcription FactorsEnzyme ActivationElectrophoresis, Polyacrylamide GelHEK293 CellsModels, BiologicalTrans-ActivatorsTranscriptional ActivationThermodynamicsHIV-1PlasmidsCell MembraneCloning, MolecularVirus AssemblyPeptide FragmentsCatalytic DomainDNA PrimersCatalysisCercopithecus aethiopsTranscription, GeneticCHO CellsZinc FingersCricetinaeNuclear ProteinsPrecipitin TestsHydrophobic and Hydrophilic InteractionsNuclear Magnetic Resonance, BiomolecularHeLa CellsHydrogen Bondinggag Gene Products, Human Immunodeficiency VirusMagnetic Resonance SpectroscopyGlutaralPeptidesProtein StabilityMembrane ProteinsSpectrometry, FluorescenceEscherichia coli ProteinsProtein TransportProtein SubunitsStructural Homology, ProteinSolutionsCarrier ProteinsRNA, Double-StrandedAraC Transcription Factor