AKR murine leukemia virusLeukemia Virus, MurineMice, Inbred AKRMoloney murine leukemia virusAvian Sarcoma VirusesSarcoma Viruses, MurineFriend murine leukemia virusKirsten murine sarcoma virusGenes, ViralLeukemia, ExperimentalAlpharetrovirusHarvey murine sarcoma virusHelper VirusesAbelson murine leukemia virusCell Transformation, ViralRNA, ViralDNA, ViralSarcomaLeukemia Virus, FelineRNA-Directed DNA PolymeraseRauscher VirusBase SequenceVirus ReplicationRetroviridae InfectionsLeukemia Virus, BovineCell LineRetroviridaeGammaretrovirusMolecular Sequence DataViral ProteinsGenome, ViralSarcoma Viruses, FelineDefective VirusesReceptors, VirusLeukemiaNucleic Acid HybridizationMoloney murine sarcoma virusGene Products, gagRous sarcoma virusRNA VirusesMink Cell Focus-Inducing VirusesTumor Virus InfectionsVirus IntegrationProvirusesVirus AssemblyGenomeRepetitive Sequences, Nucleic AcidAmino Acid SequenceSarcoma, ExperimentalVirus CultivationOncogenic VirusesMice, Inbred StrainsRecombination, GeneticVirionSarcoma, AvianGenetic VectorsCell Transformation, NeoplasticVaccinia virusMinkLeukemia, Myeloid, AcuteAntigens, ViralViral Envelope ProteinsLeukemia Virus, Gibbon ApeAvian leukosis virus3T3 Cells