Friend murine leukemia virusLeukemia Virus, MurineMoloney murine leukemia virusLeukemia, ExperimentalRetroviridae InfectionsAKR murine leukemia virusLeukemia, Erythroblastic, AcuteSpleen Focus-Forming VirusesMink Cell Focus-Inducing VirusesTumor Virus InfectionsViral Envelope ProteinsAbelson murine leukemia virusHelper VirusesDNA, ViralRetroviridaeMice, Inbred StrainsRetroviridae Proteins, OncogenicGenes, ViralGenes, envCell LineRauscher VirusBase SequenceMolecular Sequence DataLeukemia Virus, FelineVirus ReplicationViral InterferenceGene Products, gagViral ProteinsGene Products, envLeukemia Virus, BovineCell Transformation, ViralRepetitive Sequences, Nucleic AcidFriendsAmino Acid SequenceCloning, MolecularRecombination, Genetic3T3 CellsLeukemiaProto-Oncogene Protein c-fli-1Mice, Inbred AKRMice, Inbred BALB CRNA, ViralRNA-Directed DNA PolymeraseReceptors, VirusSpleenProvirusesTransfectionDefective VirusesGammaretrovirusVirus IntegrationLeukemia, Myeloid, AcuteLeukemia Virus, Gibbon ApeMinkOncogenesGenetic VectorsPreleukemiaVirionHuman T-lymphotropic virus 1Virus AssemblySarcoma Viruses, MurineErythroblastsGlycoproteinsRNA VirusesMutationSpecies SpecificityAntigens, ViralLymphomaGenes, gagGene Expression Regulation, ViralVirus CultivationXenotropic murine leukemia virus-related virusTranscription, GeneticLeukemia, LymphoidLeukemia, Lymphocytic, Chronic, B-CellPlasmidsNucleic Acid HybridizationCells, CulturedRibonuclease HDNA Restriction EnzymesThymus NeoplasmsOncogenic VirusesGene Products, taxRetroviridae ProteinsTerminal Repeat SequencesMurine Acquired Immunodeficiency SyndromeHIV-1Genes, polRadiation Leukemia VirusViral Plaque AssayVaccinia virusMuridaeDimethyl SulfoxideCell Transformation, NeoplasticDNA-Binding ProteinsHylobatesTumor Cells, CulturedEnhancer Elements, GeneticHeLa CellsDNA PrimersGenome, Viral