title: Heterogeneity of polyoma virus DNA: isolation and characterization of non-infectious small supercoiled molecules.
mesh_terms: D000818:Animals; D002499:Centrifugation, Density Gradient; D004279:DNA, Viral / Q000302:isolation & purification*; D066298:In Vitro Techniques; D051379:Mice; D008854:Microscopy, Electron; D008970:Molecular Weight; D009154:Mutation; D011120:Polyomavirus / Q000032:analysis* / Q000302:isolation & purification; D014776:Virus Cultivation
chemical_list: D004279:DNA, Viral