Leukemia Virus, MurineMoloney murine leukemia virusLeukemia Virus, FelineLeukemia Virus, BovineXenotropic murine leukemia virus-related virusLeukemiaFriend murine leukemia virusLeukemia, ExperimentalAKR murine leukemia virusRetroviridae InfectionsLeukemia, Myeloid, AcuteGammaretrovirusHuman T-lymphotropic virus 1Receptors, VirusVirus ReplicationAbelson murine leukemia virusDNA ContaminationCell LineRetroviridaeLeukemia Virus, Gibbon ApeLeukemia, Lymphocytic, Chronic, B-CellRauscher VirusRNA VirusesMolecular Sequence DataGene Products, taxDNA, ViralLeukemia, LymphoidGenes, ViralTumor Virus InfectionsProvirusesVaccinia virusDefective VirusesRNA, ViralVirus CultivationEnzootic Bovine LeukosisViral ProteinsBase SequenceLeukemia, Myelogenous, Chronic, BCR-ABL PositiveFatigue Syndrome, ChronicVirus AssemblyGene Products, gagRNA-Directed DNA PolymeraseLeukemia, T-CellVirus IntegrationCell Transformation, ViralAmino Acid SequenceMice, Inbred AKRAntigens, ViralSimian virus 40Gene Products, envVirionVirus SheddingPolymerase Chain ReactionSarcoma Viruses, MurineRetroviridae Proteins, OncogenicMink Cell Focus-Inducing VirusesVirus DiseasesGenetic VectorsLeukemia-Lymphoma, Adult T-CellOncogenic VirusesHuman T-lymphotropic virus 2DeltaretrovirusPrecursor Cell Lymphoblastic Leukemia-LymphomaRepetitive Sequences, Nucleic AcidGene Expression Regulation, ViralRadiation Leukemia VirusMice, Inbred StrainsPlant VirusesDNA VirusesSindbis VirusHylobatesCells, CulturedAvian leukosis virusLeukemia, FelineViral Envelope ProteinsTerminal Repeat SequencesT-LymphocytesMeasles virusTransfectionHTLV-I InfectionsInfluenza A Virus, H1N1 SubtypeRecombination, GeneticGene Products, rexLymphomaLeukemia, Monocytic, AcuteTranscription, GeneticPreleukemiaRabies virusLeukemia, Radiation-InducedAntibodies, ViralLeukemia, Hairy CellGenes, pXInfluenza A Virus, H5N1 SubtypeCatsGenes, gagVirus Activation3T3 CellsGenes, envMice, Inbred C57BLHelper Viruses