title: Studies on the bacteriophage MS2. VII. Structure determination of the longer polypurine sequences present in the pancreatic ribonuclease digest of the viral RNA.
mesh_terms: D001345:Autoradiography; D001435:Bacteriophages; D002848:Chromatography, DEAE-Cellulose; D006863:Hydrogen-Ion Concentration; D009711:Nucleotides / Q000032:analysis; D010744:Phosphoric Monoester Hydrolases; D010759:Phosphorus Isotopes; D011687:Purines / Q000032:analysis; D012367:RNA, Viral; D012260:Ribonucleases / Q000494:pharmacology
chemical_list: D009711:Nucleotides; D010759:Phosphorus Isotopes; D011687:Purines; D012367:RNA, Viral; D012260:Ribonucleases; D010744:Phosphoric Monoester Hydrolases