doi: 10.1016/j.carres.2008.01.044.
Epub 2008 Feb 7.
Structural analysis of the alpha-D-glucan (EPS35-5) produced by the Lactobacillus reuteri strain 35-5 glucansucrase GTFA enzyme
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- PMID: 18313039
- DOI: 10.1016/j.carres.2008.01.044
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Structural analysis of the alpha-D-glucan (EPS35-5) produced by the Lactobacillus reuteri strain 35-5 glucansucrase GTFA enzyme
Carbohydr Res.
.
Abstract
The neutral exopolysaccharide EPS35-5 (reuteran) produced from sucrose by the glucansucrase GTFA enzyme from Lactobacillus reuteri 35-5 was found to be a (1-->4,1-->6)-alpha-D-glucan, with no repeating units present. Based on linkage analysis and 1D/2D 1H and 13C NMR spectroscopy of intact EPS35-5, as well as MS and NMR analysis of oligosaccharides obtained by partial acid hydrolysis and enzymatic hydrolysis, using pullulanase M1 (Klebsiella planticola), of EPS35-5, a composite model, that includes all identified structural elements, was formulated as follows: [Formula: see text].
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