HIV Envelope Protein gp120HIV Envelope Protein gp160HIV Envelope Protein gp41HIV-1Antigens, CD4Viral Envelope Proteinsenv Gene Products, Human Immunodeficiency VirusGene Products, envReceptors, CXCR4HIV AntibodiesMolecular Sequence DataAmino Acid SequenceAIDS VaccinesEpitopesHIV InfectionsHIVNuclear EnvelopeRecombinant ProteinsCells, CulturedCell LineHIV AntigensVirionAntibodies, NeutralizingVirus InternalizationNeutralization TestsReceptors, CCR5Membrane FusionProtein PrecursorsHIV Fusion InhibitorsHIV SeropositivityVirus ReplicationGlycosylationReceptors, HIVAntibodies, MonoclonalCell FusionProtein BindingRetroviridae Proteins, OncogenicMembrane GlycoproteinsViral ProteinsPeptide FragmentsAntibodies, ViralProtein ConformationCD4-Positive T-LymphocytesModels, MolecularVirus AssemblyPeptidesBacteriophage T4Acquired Immunodeficiency SyndromeHeLa CellsBase SequenceHIV-2Recombinant Fusion ProteinsReceptors, VirusEnzyme-Linked Immunosorbent AssayMembrane Proteins