PolyomavirusPolyomavirus InfectionsAntigens, Polyomavirus TransformingMerkel cell polyomavirusBK VirusJC VirusCarcinoma, Merkel CellAntigens, Viral, TumorTumor Virus InfectionsMerkel CellsDNA, ViralCapsid ProteinsLeukoencephalopathy, Progressive MultifocalSimian virus 40Cell Transformation, ViralPolyomaviridaeDNA ReplicationMolecular Sequence DataVirus ReplicationBase SequenceCell LineCapsidEnhancer Elements, GeneticGenes, ViralUrineProto-Oncogene Proteins pp60(c-src)3T3 CellsGenome, ViralOncogene Proteins, ViralViral Regulatory and Accessory ProteinsGene Expression Regulation, ViralPolymerase Chain ReactionMutationKidney TransplantationViral Structural ProteinsParrotsViral ProteinsPlasmidsTransfectionTranscription, GeneticAntibodies, ViralCells, CulturedVirus SheddingCell Transformation, NeoplasticTranscription Factor AP-2Amino Acid SequenceVirosomesReceptors, VirusDNA-Binding ProteinsImmunocompromised HostBinding SitesPsittaciformesSkin Neoplasms1-Phosphatidylinositol 4-KinaseVirus AssemblyProtein Phosphatase 2SpodopteraRegulatory Sequences, Nucleic AcidPromoter Regions, GeneticPhylogenyCockatoosPapio ursinusVirion