title: Heterogeneity of simian virus 40 populations: virus particles containing one or two virus DNA molecules?
mesh_terms: D000818:Animals; D002250:Carbon Radioisotopes; D002460:Cell Line; D002499:Centrifugation, Density Gradient; D004279:DNA, Viral / Q000032:analysis* / Q000302:isolation & purification / Q000494:pharmacology; D004591:Electrophoresis, Polyacrylamide Gel; D000882:Haplorhini; D007668:Kidney; D008055:Lipids / Q000032:analysis; D008854:Microscopy, Electron; D009693:Nucleic Acid Hybridization; D010455:Peptides / Q000032:analysis; D010761:Phosphorus Radioisotopes; D013539:Simian virus 40 / Q000032:analysis* / Q000254:growth & development / Q000302:isolation & purification / Q000472:pathogenicity; D014316:Tritium; D010948:Viral Plaque Assay; D014764:Viral Proteins / Q000032:analysis / Q000302:isolation & purification / Q000494:pharmacology
chemical_list: D002250:Carbon Radioisotopes; D004279:DNA, Viral; D008055:Lipids; D010455:Peptides; D010761:Phosphorus Radioisotopes; D014764:Viral Proteins; D014316:Tritium