期刊
CARBOHYDRATE POLYMERS
卷 81, 期 4, 页码 964-968出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2010.03.055
关键词
Arabinoglucuronoxylan; 4-O-Methyl glucuronic acid; NMR; Softwood; Xylan
资金
- Promotion of Rice Genome Database
Xylo-oligosaccharides containing 4-O-methyl glucuronic acid (MeGlcA) residues attached to two adjacent xylosyl residues and those with a single MeGlcA residue were isolated from partial acid hydrolyzates of the arabinoglucuronoxylans (AGX) from Japanese cedar (Sugi, Cryptomaria japonica) and Hinoki cypress (Chamaecyparis obtusa). The ratio of xylo-oligosaccharides with two MeGlcA residues and those with a single MeGlcA residue was about 1:3 for both Sugi and Hinoki. Four xylo-oligosaccharides with two MeGlcA residues were labeled at their reducing end with 2-aminobenzamide (2AB). The 2AB-labeled oligosaccharides (1-4) were structurally characterized using normal-phase liquid chromatography, electrospray-ionization mass spectrometry (ESI-MS), and nuclear magnetic resonance (NMR) spectroscopy. The signals in the (1)H and (13)C NMR spectra of the 2AB-labeled oligosaccharides were fully assigned using one- and two-dimensional NMR spectroscopy. (C) 2010 Elsevier Ltd. All rights reserved.
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