HIV Envelope Protein gp120HIV Envelope Protein gp160HIV Envelope Protein gp41HIV-1Antigens, CD4Viral Envelope Proteinsenv Gene Products, Human Immunodeficiency VirusGene Products, envMolecular Sequence DataAmino Acid SequenceReceptors, CXCR4HIV AntibodiesProtein ConformationEpitopesAIDS VaccinesHIV InfectionsHIVModels, MolecularRecombinant ProteinsProtein BindingNuclear EnvelopeBinding SitesProtein Structure, TertiaryCell LineCells, CulturedVirus InternalizationVirionHIV AntigensKineticsProtein Structure, SecondaryMembrane FusionAntibodies, NeutralizingCrystallography, X-RayNeutralization TestsCircular DichroismAntibodies, MonoclonalPeptide FragmentsSpectrometry, FluorescenceReceptors, CCR5MutationPeptidesProtein PrecursorsHIV Fusion InhibitorsGlycosylationMolecular ConformationVirus ReplicationBase SequenceReceptors, HIVCell FusionEscherichia coliHIV SeropositivityMembrane GlycoproteinsViral ProteinsThermodynamicsHydrogen-Ion ConcentrationMutagenesis, Site-DirectedStructure-Activity RelationshipLigandsRecombinant Fusion ProteinsRetroviridae Proteins, OncogenicBacteriophage T4Protein FoldingMembrane ProteinsCell MembraneHeLa CellsVirus AssemblyAmino Acid SubstitutionCytokine Receptor gp130Antibodies, ViralProtein Structure, QuaternaryReceptors, VirusDimerizationTemperatureBacterial ProteinsSurface Plasmon ResonanceCD4-Positive T-LymphocytesGlycoproteinsMagnetic Resonance SpectroscopyNucleic Acid ConformationMolecular Dynamics SimulationEnzyme-Linked Immunosorbent AssayAcquired Immunodeficiency SyndromeModels, ChemicalViral Fusion ProteinsNuclear Magnetic Resonance, BiomolecularHIV-2Sequence Homology, Amino Acidgp100 Melanoma AntigenProtein DenaturationCysteineAdenosine TriphosphateTryptophanElectrophoresis, Polyacrylamide GelAnti-HIV AgentsDisulfidesEpitope MappingAllosteric RegulationT-Lymphocytes