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首页> 外文期刊>Carbohydrate research >Structural characterisation of a perdeuteriomethylated exopolysaccharide by NMR spectroscopy: characterisation of the novel exopolysaccharide produced by Lactobacillus delbrueckii subsp. bulgaricus EU23
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Structural characterisation of a perdeuteriomethylated exopolysaccharide by NMR spectroscopy: characterisation of the novel exopolysaccharide produced by Lactobacillus delbrueckii subsp. bulgaricus EU23

机译：通过NMR光谱对全氘甲基化的胞外多糖进行结构表征：由德氏乳杆菌亚种产生的新型胞外多糖的表征。保加利亚EU23

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摘要

The exopolysaccharide (EPS) from Lactobacillus delbrueckii subsp. bulgaricus EU23 was perdeuteriomethylated and the perdeuteriomethylated ESP (pdm-EPS) purified by elution from a C_(18) Sep-Pak cartridge. Both 1D and 2d NMR spectra were recorded for the pdm-EPS and these were interpreted to provide assignments for the individual ~1H and ~(13)C resonances of the sugar residues of the repeating unit. Using a combination of the results from monomer analysis and linkage analysis of the native EPS and the ROESY and HMBC NMR spectra of the pdm-EPS the following structure has been determined for the repeating unit: A process for characterising polysaccharides having low solubility in aqueous solution is reported.
机译：德氏乳杆菌亚种的胞外多糖（EPS）。通过从C_（18）Sep-Pak柱中洗脱纯化保加利亚EU23进行全氘甲基化，并纯化全氘甲基化ESP（pdm-EPS）。记录了pdm-EPS的1D和2d NMR光谱，并解释了这些光谱以提供重复单元糖残基的个别〜1H和〜（13）C共振的分配。结合单体EPS和天然EPS的连锁分析结果以及pdm-EPS的ROESY和HMBC NMR光谱，确定了重复单元的以下结构：表征在水溶液中溶解度低的多糖的方法被报道。

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