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  • Title: Structure of the cell wall polysaccharides of probiotic bifidobacteria Bifidobacteriumbifidum BIM B-465.
    Author: Zdorovenko EL, Kachala VV, Sidarenka AV, Izhik AV, Kisileva EP, Shashkov AS, Novik GI, Knirel YA.
    Journal: Carbohydr Res; 2009 Nov 23; 344(17):2417-20. PubMed ID: 19804881.
    Abstract:
    The composition and structure of cell wall polysaccharides of a biotechnologically promising probiotic strain of bifidobacteria Bifidobacteriumbifidum BIM B-465 were established by monosaccharide and methylation analyses along with 2D (1)H-(1)H homonuclear and (1)H-(13)C heteronuclear correlation NMR spectroscopy. The major polysaccharide represents a branched glucogalactan consisting of heptasaccharide repeating units having the following structure: -->6)-alpha-D-Glcp-(1-->3)-beta-D-Galf-(1-->3)-alpha-D-Glcp-(1-->2)-beta-D-Galf-(1-->3)-alpha-D-Galp-(1-->3)-alpha-D-Glcp-(1--> [structure: see the text]. The second isolated polysaccharide is a branched glucan with the main chain of (1-->6)-linked alpha-d-glucopyranose residues, approximately 60% of which are 2-substituted with a single alpha-d-glucopyranosyl group. This polysaccharide is a characteristic of various microorganisms, including some lactobacteria studied earlier.
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