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- W2479464021 abstract "The structural analysis of complex carbohydrates typically requires the assignment of three parameters: monosaccharide composition, the position of glycosidic linkages between monosaccharides, and the position and nature of noncarbohydrate substituents. The glycosidic linkage positions are often determined by permethylation analysis, but this can be complicated by high viscosity or poor solubility, resulting in under-methylation. This is a drawback because an under-methylated position may be misinterpreted as the erroneous site of a linkage or substituent. Here, we describe an alternative approach to linkage analysis that makes use of a nonreversible deuterium exchange of C-H protons on the carbohydrate backbone. The exchange reaction is conducted in deuterated water catalyzed by Raney nickel, and results in the selective exchange of C-H protons adjacent to free hydroxyl groups. Hence, the position of the residual C-H protons is indicative of the position of glycosidic linkages or other substituents and can be readily assigned by heteronuclear single quantum coherence-nuclear magnetic resonance (HSQC-NMR) or, following suitable derivatization, by gas chromatography-mass spectroscopy (GC/MS) analysis. Moreover, because the only changes to the parent sugar are proton/deuterium exchanges, the composition and linkage analysis can be determined in a single step." @default.
- W2479464021 created "2016-08-23" @default.
- W2479464021 creator A5005500543 @default.
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- W2479464021 date "2015-06-26" @default.
- W2479464021 modified "2023-09-25" @default.
- W2479464021 title "Nickel-Catalyzed Proton–Deuterium Exchange (HDX) Procedures for Glycosidic Linkage Analysis of Complex Carbohydrates" @default.
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- W2479464021 doi "https://doi.org/10.1021/acs.analchem.5b01505" @default.
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