AKR murine leukemia virusLeukemia Virus, MurineEndogenous RetrovirusesMice, Inbred AKRMoloney murine leukemia virusAvian Sarcoma VirusesSarcoma Viruses, MurineFriend murine leukemia virusRetroviridae InfectionsRetroviridaeGenes, ViralKirsten murine sarcoma virusLeukemia, ExperimentalAlpharetrovirusHarvey murine sarcoma virusHelper VirusesAbelson murine leukemia virusRNA, ViralDNA, ViralBase SequenceRNA-Directed DNA PolymeraseCell Transformation, ViralTerminal Repeat SequencesGammaretrovirusLeukemia Virus, FelineSarcomaProvirusesVirus ReplicationMolecular Sequence DataRauscher VirusCell LineGenome, ViralLeukemia Virus, BovineVirus IntegrationViral ProteinsGene Products, gagReceptors, VirusGenomeSarcoma Viruses, FelineGenes, polDefective VirusesGene Products, envGenes, envLeukemiaMoloney murine sarcoma virusBetaretrovirusNucleic Acid HybridizationGenes, gagAmino Acid SequenceRous sarcoma virusRecombination, GeneticRepetitive Sequences, Nucleic AcidRNA VirusesTumor Virus InfectionsPhylogenyMink Cell Focus-Inducing VirusesVirionViral Envelope ProteinsVirus AssemblyGenetic VectorsSarcoma, ExperimentalVirus CultivationTranscription, GeneticGene Expression Regulation, ViralSpecies SpecificityOncogenic VirusesRetroviridae ProteinsMice, Inbred StrainsCell Transformation, NeoplasticSarcoma, AvianCloning, MolecularMinkAvian leukosis virusVaccinia virusAntigens, ViralLeukemia Virus, Gibbon ApeSequence Analysis, DNALeukemia, Myeloid, Acute3T3 CellsHuman T-lymphotropic virus 1Genes, Intracisternal A-ParticleCells, Cultured