AKR murine leukemia virusLeukemia Virus, MurineMice, Inbred AKRMoloney murine leukemia virusFriend murine leukemia virusLeukemia, ExperimentalAbelson murine leukemia virusLeukemia Virus, FelineRauscher VirusRetroviridae InfectionsLeukemia Virus, BovineNeoplasms, ExperimentalSarcoma, ExperimentalCell LineLeukemiaRetroviridaeMice, Inbred StrainsVirus ReplicationMink Cell Focus-Inducing VirusesDNA, ViralMice, Inbred BALB CMolecular Sequence DataGenes, ViralNeoplasm TransplantationMice, Inbred C57BLRNA-Directed DNA PolymeraseReceptors, VirusFibrosarcomaBase SequenceSpleenTumor Virus InfectionsCytotoxicity, ImmunologicTransplantation, IsogeneicProvirusesGene Products, gagLymphomaT-LymphocytesGammaretrovirusLeukemia, Myeloid, AcuteVirus IntegrationRNA, ViralLeukemia Virus, Gibbon ApeViral Proteins