Structural studies of an exopolysaccharide produced by Streptococcus thermophilus THS |
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Authors: | Nordmark Eva-Lisa Yang Zhennai Huttunen Eine Widmalm Göran |
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Institution: | Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden. |
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Abstract: | The structure of an extracellular polysaccharide (EPS) from Streptococcus thermophilus THS has been determined. A combination of component analysis, methylation analysis and NMR spectroscopy shows that the polysaccharide is composed of pentasaccharide repeating units. Sequential information was obtained by two-dimensional (1)H,(1)H-NOESY and (1)H,(13)C-HMBC NMR experiments. NMR data indicate different mobility within the EPS with a stiffer backbone and a more flexible side-chain. |
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