AKR murine leukemia virusLeukemia Virus, MurineMice, Inbred AKREndogenous RetrovirusesMoloney murine leukemia virusFriend murine leukemia virusLeukemia, ExperimentalRetroviridae InfectionsRetroviridaeAbelson murine leukemia virusLeukemia Virus, FelineTerminal Repeat SequencesRauscher VirusProvirusesLeukemia Virus, BovineMolecular Sequence DataCell LineDNA, ViralGammaretrovirusGene Products, gagGene Products, envBase SequenceVirus ReplicationRNA-Directed DNA PolymeraseGenes, ViralLeukemiaReceptors, VirusGenes, gagVirus IntegrationGenes, envMink Cell Focus-Inducing VirusesViral Envelope ProteinsRNA, ViralGenes, polTumor Virus InfectionsRepetitive Sequences, Nucleic AcidAmino Acid SequenceViral ProteinsGenetic VectorsMice, Inbred StrainsBetaretrovirusVirionLeukemia Virus, Gibbon ApeLeukemia, Myeloid, AcuteRetroviridae Proteins3T3 Cells