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, BovineRetroviridaeCell LineGammaretrovirusViral ProteinsGenome, ViralSarcoma Viruses, FelineMolecular Sequence DataDefective VirusesReceptors, VirusLeukemiaNucleic Acid HybridizationMoloney murine sarcoma virusGene Products, gagRous sarcoma virusRNA VirusesMink Cell Focus-Inducing VirusesTumor Virus InfectionsVirus IntegrationProvirusesVirus AssemblyGenomeSarcoma, ExperimentalRepetitive Sequences, Nucleic AcidVirus CultivationAmino Acid SequenceOncogenic VirusesVirionMice, Inbred StrainsRecombination, GeneticSarcoma, AvianGenetic VectorsVaccinia virusCell Transformation, NeoplasticMinkLeukemia, Myeloid, AcuteAntigens, ViralViral Envelope ProteinsLeukemia Virus, Gibbon ApeAvian leukosis virus3T3 Cells