RNA Composition and Base Pairing

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Science  08 Jul 1966:
Vol. 153, Issue 3732, pp. 178-180
DOI: 10.1126/science.153.3732.178


If RNA may contain a small proportion of adenine-guanine base pairs, these could interrupt the continuity of helical structure in a polynucleotide, in keeping with current theories of RNA structure, and could also account for the experimentally observed tendency for 6-amino bases to equal 6-keto bases and for purines to exceed pyrimidines.