Antigens, ViralViral Envelope ProteinsAKR murine leukemia virusAntigen-Antibody ReactionsAntigensNeutralization TestsAntibodies, ViralHepatitis B e AntigensImmune SeraVaccinia virusNuclear EnvelopeEpitopesAntigens, BacterialHepatitis B virusAntigens, NeoplasmAntigens, SurfaceHIV Envelope Protein gp120Antigens, ProtozoanAntigens, Polyomavirus TransformingHLA AntigensMolecular Sequence DataHIV Envelope Protein gp41Antigens, CDAntigens, FungalAntigens, HelminthAmino Acid SequenceH-2 AntigensAntibodies, MonoclonalAntigens, CD4Cell LineGene Products, envCarcinoembryonic AntigenAntigens, Viral, TumorHLA-DR AntigensReceptors, Antigen, T-CellHistocompatibility AntigensProliferating Cell Nuclear AntigenHIV-1Histocompatibility Antigens Class IICross ReactionsT-LymphocytesO AntigensReceptors, Antigen, B-CellProstate-Specific AntigenEnzyme-Linked Immunosorbent AssayHepatitis B Surface AntigensAntigens, CD8Antigens, CD15Immunoglobulin GHLA-A2 AntigenAntigens, Tumor-Associated, CarbohydrateMice, Inbred BALB CAntibody Specificityenv Gene Products, Human Immunodeficiency VirusFluorescent Antibody TechniqueHIV AntigensBase SequenceAntigens, CD3Blood Group AntigensHLA-A AntigensHistocompatibility Antigens Class ILymphocyte ActivationHIV AntibodiesImmunizationAntibody FormationCell MembraneVirionMembrane ProteinsHLA-D AntigensGlycoproteinsHepatitis B AntigensCells, CulturedMicroscopy, ElectronReceptors, AntigenMolecular WeightAntigens, CD45Recombinant Fusion ProteinsRecombinant ProteinsAntibodies, BacterialAntigens, CD1B-LymphocytesLaminsAntigens, DifferentiationVirus InternalizationHLA-B AntigensElectrophoresis, Polyacrylamide GelGenes, envMutationMembrane FusionMembrane GlycoproteinsRabbitsBacterial ProteinsCell FusionVirus ReplicationViral ProteinsMART-1 AntigenAntibodies, NeutralizingPeptidesCD4-Positive T-LymphocytesImmunoenzyme Techniques