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Science 2 February 1973:
Vol. 179. no. 4072, pp. 495 - 496
DOI: 10.1126/science.179.4072.495
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Articles

Cytidylic Acid "a" Trihydrate: Structure and Conformation

Gopinath Kartha 1, Gopal Ambady 1, and M. A. Viswamitra 1

1 Center for Crystallographic Research, Roswell Park Memorial Institute, Buffalo, New York 14203

Cytidylic acid "a" (cytidine 2'-monophosphate) crystallizes in the triclinic space group P1 with two molecules of cytidine monophosphate (C9H14O8N3P) and six molecules of water in the unit cell. X-ray analysis of this crystal shows that in both molecules, the base is in the anti conformation, the ribose ring is C(2')-endo puckered, and the hydroxyl O(5') is gauche-gauche. The two molecules are linked by a short hydrogen bond through the phosphate oxygens.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)