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Structure of a neutral exopolysaccharide produced by Lactobacillus delbrueckii ssp. bulgaricus LBB.B26.

Sánchez-Medina I, Gerwig GJ, Urshev ZL, Kamerling JP

Bijvoet Center, Department of Bio-Organic Chemistry, Utrecht University, Padualaan 8, NL-3584 CH Utrecht, The Netherlands.

The neutral exopolysaccharide produced by Lactobacillus delbrueckii ssp. bulgaricus LBB.B26 in skimmed milk was found to be composed of d-glucose and d-galactose in a molar ratio of 2:3. Linkage analysis and 1D/2D NMR ((1)H and (13)C) studies performed on the native polysaccharide, and on an oligosaccharide obtained from a partial acid hydrolysate of the native polysaccharide, showed the polysaccharide to consist of branched pentasaccharide repeating units with the following structure. [structure: see text]

Published 24 September 2007 in Carbohydr Res, 342(16): 2430-9.
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