AKR murine leukemia virusLeukemia Virus, MurineEndogenous RetrovirusesMice, Inbred AKRMoloney murine leukemia virusProvirusesTerminal Repeat SequencesFriend murine leukemia virusLeukemia, ExperimentalAbelson murine leukemia virusRetroviridae InfectionsLeukemia Virus, FelineRetroviridaeRauscher VirusLeukemia Virus, BovineCell LineLeukemiaMolecular Sequence DataVirus ReplicationDNA, ViralBase SequenceGenes, ViralRNA-Directed DNA PolymeraseMink Cell Focus-Inducing VirusesReceptors, VirusGene Products, gagGammaretrovirusVirus IntegrationTumor Virus InfectionsRNA, ViralMice, Inbred StrainsLeukemia Virus, Gibbon ApeLeukemia, Myeloid, AcuteViral ProteinsViral Envelope ProteinsGenetic VectorsAmino Acid Sequence3T3 Cells