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Structure of the exopolysaccharide produced byStreptococcus thermophilusS3

Authors
Journal
Carbohydrate Research
0008-6215
Publisher
Elsevier
Publication Date
Volume
331
Issue
2
Identifiers
DOI: 10.1016/s0008-6215(01)00013-1
Keywords
  • Lactic Acid Bacteria
  • Exopolysaccharide
  • Streptococcus Thermophilus
  • Structural Analysis

Abstract

Abstract The exopolysaccharide of Streptococcus thermophilus S3, produced in skimmed milk, is composed of d-galactose and l-rhamnose in a molar ratio of 2:1. The polysaccharide contains 0.4 equiv of O-acetyl groups per repeating unit. Linkage analysis and 1D/2D NMR ( 1H and 13C) studies on native and O-deacetylated EPS together with nanoES-CID tandem mass spectrometry studies on oligosaccharides generated by a periodate oxidation protocol, show the polysaccharide to have the following structure:

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