SwineAntigens, HeterophileCell LineEndogenous RetrovirusesSwine, MiniatureCell Line, TumorTransplantation, HeterologousSwine DiseasesCell Line, TransformedMolecular Sequence DataCells, CulturedTumor Cells, CulturedRNA, MessengerTransfectionBase SequenceApoptosisGene Expression Regulation, NeoplasticCell SurvivalCell ProliferationAntineoplastic AgentsBlotting, WesternCell DivisionMice, NudeReverse Transcriptase Polymerase Chain ReactionGene ExpressionDrug Screening Assays, AntitumorSignal TransductionNeoplasm ProteinsPromoter Regions, GeneticTranscription, GeneticCell DifferentiationDrug Resistance, NeoplasmFlow CytometryNeoplasm TransplantationMutationGene Expression RegulationL Cells (Cell Line)