The DNA of bacteriophage PM 2. Ultracentrifugal evidence for a circular structure.
D001435:Bacteriophages; D002499:Centrifugation, Density Gradient; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D004279:DNA, Viral; D009691:Nucleic Acid Denaturation; D010759:Phosphorus Isotopes
D004279:DNA, Viral; D010759:Phosphorus Isotopes