HIV Envelope Protein gp120HIV Envelope Protein gp160HIV Envelope Protein gp41HIV-1Antigens, CD4Viral Envelope ProteinsReceptors, CXCR4env Gene Products, Human Immunodeficiency VirusGene Products, envHIV AntibodiesMolecular Sequence DataAmino Acid SequenceAIDS VaccinesEpitopesHIV InfectionsHIVReceptors, CCR5Nuclear EnvelopeRecombinant ProteinsCells, CulturedCell LineVirus InternalizationHIV AntigensHIV Fusion InhibitorsVirionAntibodies, NeutralizingNeutralization TestsMembrane FusionVirus ReplicationCell FusionHIV SeropositivityProtein BindingGlycosylationViral TropismProtein PrecursorsAntibodies, MonoclonalPeptide FragmentsCD4-Positive T-LymphocytesReceptors, VirusHIV-2Receptors, HIVMembrane GlycoproteinsRetroviridae Proteins, OncogenicAnti-HIV AgentsAcquired Immunodeficiency SyndromeHeLa CellsViral ProteinsProtein ConformationModels, MolecularTropismRecombinant Fusion ProteinsPeptidesGenes, envAntibodies, ViralT-LymphocytesVirus AssemblyBase SequenceBacteriophage T4Virus AttachmentGiant CellsMembrane ProteinsBinding SitesSimian immunodeficiency virusMutationEnzyme-Linked Immunosorbent Assay