Genes, envViral Envelope ProteinsGene Products, envMolecular Sequence DataNuclear EnvelopeHIV Envelope Protein gp120Amino Acid SequenceEndogenous RetrovirusesBase Sequenceenv Gene Products, Human Immunodeficiency VirusHIV-1Genes, ViralCloning, MolecularLeukemia Virus, FelineHIV Envelope Protein gp41Cell LineLeukemia Virus, MurinePhylogenyRetroviridae InfectionsMutationDNA, ViralProvirusesSequence Homology, Amino AcidSequence Analysis, DNANeutralization TestsRetroviridae ProteinsCornified Envelope Proline-Rich ProteinsFriend murine leukemia virusHIV AntibodiesSpleen Focus-Forming VirusesCatarrhiniVirus ReplicationGenetic VariationViral ProteinsRetroviridaeCell FusionPlasmidsRNA, ViralAntigens, CD4Escherichia coliRecombination, GeneticHIV Envelope Protein gp160Simian immunodeficiency virusLeukemia, ExperimentalPregnancy ProteinsAIDS VaccinesSequence Homology, Nucleic AcidSequence AlignmentAKR murine leukemia virusGenome, ViralGenesGiant CellsDengue VirusPolymerase Chain ReactionGenetic VectorsMink Cell Focus-Inducing VirusesGenes, BacterialEvolution, MolecularBacterial ProteinsRestriction MappingTransfectionOpen Reading FramesEncephalitis Virus, JapanesePhenotypeReceptors, VirusVirionLentivirus InfectionsMoloney murine leukemia virusDNA PrimersHeLa CellsHIV InfectionsAntibodies, ViralGenes, polHeteroduplex AnalysisTerminal Repeat SequencesHIVImmunodeficiency Virus, FelineReceptors, CCR5Vaccinia virusGlycoproteinsMacaca mulattaCells, CulturedDengueTranscription, GeneticRecombinant Fusion ProteinsEpitopesSpecies SpecificityViral Structural ProteinsMembrane ProteinsBiological ProductsEncephalitis, JapaneseVirulenceReticuloendotheliosis, AvianCatsRecombinant ProteinsSimian Acquired Immunodeficiency SyndromeRNA, MessengerAntigens, ViralAntibodies, NeutralizingReticuloendotheliosis Viruses, Avian