title: Origins of SV40 genetic variation.
mesh_terms: D000818:Animals; D002460:Cell Line; D002472:Cell Transformation, Viral; D002522:Chlorocebus aethiops; D003673:Defective Viruses; D005814:Genes, Viral; D014644:Genetic Variation; D051379:Mice; D009154:Mutation; D010957:Plasmids; D011995:Recombination, Genetic; D013539:Simian virus 40 / Q000235:genetics*; D014162:Transfection; D014779:Virus Replication