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  • Title: Structural study on an exocellular polysaccharide produced by Lactobacillus helveticus TY1-2.
    Author: Yamamoto Y, Murosaki S, Yamauchi R, Kato K, Sone Y.
    Journal: Carbohydr Res; 1994 Aug 03; 261(1):67-78. PubMed ID: 8087810.
    Abstract:
    Lactobacillus helveticus TY1-2 produced an exocellular polysaccharide when it was cultured in reconstituted skim milk. This polysaccharide is a high molecular weight heteropolymer of D-glucopyranosyl, D-galactopyranosyl, and 2-acetamido-2-deoxy-D-glucopyranosyl residues in the molar ratio 3.0:2.8:0.9. The primary structure of the polysaccharide was shown by glycose analysis, methylation analysis, Smith degradation, and NMR spectroscopy to be composed of branched heptasaccharide repeating units having the following structure: [formula: see text]
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