title: Nonintegrated viral DNA in rat cells doubly transformed by SV40 and polyoma virus.
mesh_terms: D002455:Cell Division; D002460:Cell Line; D002472:Cell Transformation, Viral; D002999:Clone Cells; D004279:DNA, Viral / Q000032:analysis*; D005814:Genes, Viral; D011120:Polyomavirus / Q000235:genetics; D013539:Simian virus 40 / Q000235:genetics
chemical_list: D004279:DNA, Viral