CatsImmunodeficiency Virus, FelineLeukemia Virus, FelineFeline panleukopenia virusCoronavirus, FelineCell LineParvovirus, CanineCell Line, TumorFeline Acquired Immunodeficiency SyndromeReceptors, VirusCat DiseasesCalicivirus, FelineCell Line, TransformedMolecular Sequence DataFeline PanleukopeniaDogsSarcoma Viruses, FelineVirus ReplicationFeline Infectious PeritonitisTumor Cells, CulturedLeukemia, FelineBase SequenceRNA, MessengerTransfectionLentivirus InfectionsApoptosisGene Expression Regulation, NeoplasticCell SurvivalCell ProliferationAmino Acid SequenceBlotting, WesternReverse Transcriptase Polymerase Chain ReactionAntineoplastic AgentsCell DivisionGene ExpressionMice, NudeCells, CulturedDrug Screening Assays, AntitumorSignal TransductionMutationPolymerase Chain ReactionRetroviridaeFlow CytometryPromoter Regions, GeneticTranscription, GeneticFelidaeLentiviruses, FelineNeoplasm Proteins