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- W2079771259 abstract "Crystals of glycylglycine phosphate monohydrate were obtained by evaporating an aqueous solution containing equimolar quantities of phosphoric acid and the dipeptide, glycylglycine. The crystals are orthorhombic, space group Pna2t, with a=17879 (6), b=12-130 (4) and c=4-621 (1)A. Threedimensional intensity data were collected using a Picker FACS-1 diffractometer. The structure was solved by the heavy-atom method and was refined by full-matrix least squares to R = 0.024. The crystal structure features a short hydrogen bond (2.503 +_ 0-003 A) between the phosphate moiety and the carboxyl group of the dipeptide. Although the least-squares refinement suggested that the hydrogen atom involved in this bond might be positioned symmetrically between the two oxygen atoms, difference Fourier maps and the observed C-O and P-O bond lengths indicate that it is bonded covalently to the carboxyl oxygen atom. Thus, the compound is properly formulated as (glycylglycine.H)+(H2PO4) -. The crystal structure also involves a short hydrogen bond of 2.571 (3) A between phosphate moieties related by the e translation. The peptide conformation is not significantly different from that found in other crystal structures." @default.
- W2079771259 created "2016-06-24" @default.
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- W2079771259 date "1972-10-15" @default.
- W2079771259 modified "2023-09-26" @default.
- W2079771259 title "The crystal structure of glycylglycine phosphate monohydrate" @default.
- W2079771259 doi "https://doi.org/10.1107/s0567740872007204" @default.
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