Open AccessTHE STUDY OF THE STRUCTURE OF URIDINE 3′, 5′-CYCLIC PHOSPHATE (c-UMP) CRYSTAL
Author(s) -
QiTai Zheng,
Shuo Dou,
Gu Yuan-Xin
Publication year - 1981
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.30.1369
Subject(s) - monoclinic crystal system , molecule , crystallography , diffraction , crystal (programming language) , crystal structure , unit (ring theory) , uridine , fourier transform , materials science , unit circle , phosphate , physics , combinatorics , chemistry , optics , mathematics , quantum mechanics , computer science , organic chemistry , rna , programming language , mathematics education , biochemistry , gene
Uridine 3′, 5′-cyclic phosphate (c-UMP) crystal is colourless and transparent. The molecular formula is C9,H11O8N2P. The crystal belongs to monoclinic system and its space group is C21-P2. The parameters of unit cell are as follows: a = 10.767(6)?, b = 7.152 (4)?, c = 10.414 (5)? and β = 112.77(31)°. There are two molecules in an unit cell (Z = 2). The diffraction data were collected using PW-1100 four circle dif-fractometer. The number of independent diffraction data amounts to 1658. The structure was determined by applying Patterson analysis, direct method and Fourier synthesis. There are some solvate molecules whose distribution exhibit partial disorder in an unit cell. The structure parameters have been refined by means of block-matrix least-square method, R - 0.084.