title: Purification and properties of intracellular lamba DNA rings.
mesh_terms: D002499:Centrifugation, Density Gradient; D002845:Chromatography; D003090:Coliphages; D004269:DNA, Bacterial; D004279:DNA, Viral / Q000528:radiation effects; D003851:Deoxyribonucleases; D004926:Escherichia coli; D006863:Hydrogen-Ion Concentration; D008854:Microscopy, Electron; D008970:Molecular Weight; D009691:Nucleic Acid Denaturation; D010759:Phosphorus Isotopes; D011523:Protoplasts; D011830:Radiation Effects; D012964:Sodium; D014316:Tritium; D014461:Ultracentrifugation
chemical_list: D004269:DNA, Bacterial; D004279:DNA, Viral; D010759:Phosphorus Isotopes; D014316:Tritium; D012964:Sodium; D003851:Deoxyribonucleases