AKR murine leukemia virusLeukemia Virus, MurineAvian Sarcoma VirusesMice, Inbred AKRMoloney murine leukemia virusAlpharetrovirusSarcoma, AvianFriend murine leukemia virusSarcoma Viruses, MurineCell Transformation, ViralLeukemia, ExperimentalAbelson murine leukemia virusGenes, ViralSarcomaLeukemia Virus, FelineAvian leukosis virusDNA, ViralViral ProteinsRauscher VirusRetroviridaeChick EmbryoRNA-Directed DNA PolymeraseDefective VirusesRNA, ViralCell LineVirus ReplicationRetroviridae InfectionsLeukemia Virus, BovineBase SequenceReceptors, VirusGene Products, gagOncogene Protein pp60(v-src)GammaretrovirusCell Transformation, NeoplasticSarcoma, ExperimentalSarcoma Viruses, FelineMolecular Sequence DataHelper VirusesKirsten murine sarcoma virusLeukemiaMoloney murine sarcoma virusVirus IntegrationQuailRetroviridae ProteinsRous sarcoma virusNucleic Acid HybridizationMink Cell Focus-Inducing VirusesRepetitive Sequences, Nucleic AcidTumor Virus InfectionsRNA VirusesIntegrasesOncogenesChickensAmino Acid SequenceProvirusesRecombination, GeneticVirus AssemblyVirus CultivationAntigens, ViralCells, CulturedVirionHarvey murine sarcoma virusMice, Inbred StrainsOncogenic VirusesViral Envelope ProteinsGenetic VectorsMinkCloning, MolecularGene Products, envDucksLeukemia, Myeloid, AcuteMutationLeukemia Virus, Gibbon ApeGenes, gagDNA Restriction EnzymesRetroviridae Proteins, OncogenicSpecies Specificity3T3 Cells