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Structural study on an exocellular polysaccharide produced by Lactobacillus helveticus TY1-2

✍ Scribed by Yoshihiro Yamamoto; Shinji Murosaki; Ryo Yamauchi; Koji Kato; Yoshiaki Sone

Book ID: 102996339
Publisher: Elsevier Science
Year: 1994
Tongue: English
Weight: 765 KB
Volume: 261
Category: Article
ISSN: 0008-6215
DOI: 10.1016/0008-6215(94)80006-5

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✦ Synopsis

Lactobacillus helveticus TYl-2 produced an exocellular polysaccharide when it was cultured in reconstituted skim milk. This polysaccharide is a high molecular weight heteropolymer of o-glucopyranosyl, o-galactopyranosyl, and 2-acetamido-2-deoxy-o-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: o.8bD-GalP~

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