AKR murine leukemia virusLeukemia Virus, MurineMice, Inbred AKRMoloney murine leukemia virusNeoplasms, ExperimentalSarcoma, ExperimentalFriend murine leukemia virusLeukemia, ExperimentalTransplantation, IsogeneicNeoplasm TransplantationAbelson murine leukemia virusMice, Inbred BALB CCytotoxicity, ImmunologicCell Line, TumorLeukemia Virus, FelineRauscher VirusMice, Inbred C57BLRetroviridae InfectionsLeukemia Virus, BovineCell LineTumor Cells, CulturedLeukemiaMice, Inbred StrainsRetroviridaeMolecular Sequence DataFibrosarcomaBase SequenceVirus ReplicationDNA, ViralMink Cell Focus-Inducing VirusesGenes, ViralRNA-Directed DNA PolymeraseLymphomaReceptors, VirusTumor Virus InfectionsSpleenT-LymphocytesAntigens, NeoplasmProvirusesGene Products, gagGammaretrovirusLeukemia, Myeloid, AcuteGenetic VectorsVirus IntegrationAmino Acid SequenceRNA, ViralViral ProteinsLeukemia Virus, Gibbon ApeTransfection