OncogenesRetroviridaeGenetic VectorsCell Transformation, NeoplasticGenes, rasVirus IntegrationMoloney murine leukemia virusRetroviridae InfectionsEndogenous RetrovirusesLeukemia Virus, MurineBase SequenceCell LineMolecular Sequence DataTransfectionGene Transfer TechniquesGenetic TherapyProto-Oncogenes3T3 CellsGenes, mycProvirusesRetroviridae ProteinsCell Line, TransformedTerminal Repeat SequencesOncogene Proteins, ViralCell Transformation, ViralMutationDNA, ViralGene ExpressionRetroviridae Proteins, OncogenicIntegrasesGene Expression Regulation, NeoplasticProto-Oncogene Proteins c-mycCells, CulturedHematopoietic Stem CellsTranscription, GeneticCell DivisionHarvey murine sarcoma virusPapillomavirus E7 ProteinsOncogene Protein p55(v-myc)Kanamycin KinaseTumor Cells, CulturedProto-Oncogene ProteinsAvian leukosis virusAvian Sarcoma VirusesAmino Acid SequenceGene AmplificationGene Products, gagGenes, ViralRNA-Directed DNA PolymeraseRepetitive Sequences, Nucleic AcidGenes, Tumor SuppressorRNA, MessengerHIV-1Polymerase Chain ReactionOncogene Proteins v-rafCloning, MolecularFibroblastsMutagenesis, InsertionalNeoplasmsGenes, srcGene Expression RegulationRNA, ViralBetaretrovirusVirus ReplicationOncogene Protein p21(ras)Blotting, SouthernGenes, gagProto-Oncogene Proteins p21(ras)AlpharetrovirusOncogene ProteinsRecombinant Fusion ProteinsPromoter Regions, GeneticDNA-Binding ProteinsDNA PrimersCell Line, TumorGammaretrovirusLentivirusSignal TransductionAvian myeloblastosis virusDNA, NeoplasmGene Expression Regulation, ViralCell DifferentiationFriend murine leukemia virusMason-Pfizer monkey virusTranscription FactorsViral Envelope ProteinsLeukemia, ExperimentalGenes, polNIH 3T3 CellsPlasmidsRous sarcoma virusGene Products, envRecombination, GeneticNucleic Acid HybridizationDNAHelper VirusesMice, TransgenicAntigens, Polyomavirus TransformingTumor Suppressor Protein p53Oncogene Proteins, Fusion