Allocation of polypurine tracts to two fragments of bacteriophage MS2 RNA.
D002499:Centrifugation, Density Gradient; D002845:Chromatography; D003090:Coliphages; D011687:Purines / Q000032:analysis*; D012367:RNA, Viral / Q000032:analysis*; D012260:Ribonucleases
D011687:Purines; D012367:RNA, Viral; D012260:Ribonucleases