title: Studies on DNA from low-density particles of SV40. II. Noninfectious virions associated with a large-plaque variant.
mesh_terms: D000941:Antigens / Q000032:analysis; D002499:Centrifugation, Density Gradient; D003168:Complement Fixation Tests; D046508:Culture Techniques; D003588:Cytopathogenic Effect, Viral; D004279:DNA, Viral / Q000032:analysis; D003673:Defective Viruses; D008854:Microscopy, Electron; D013539:Simian virus 40 / Q000276:immunology; D014776:Virus Cultivation
chemical_list: D000941:Antigens; D004279:DNA, Viral