Water-soluble and water-insoluble glucans produced by Escherichia coli recombinant dextransucrases from Leuconostoc mesenteroides NRRL B-512F |
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| Authors: | Funane K Ishii T Matsushita M Hori K Mizuno K Takahara H Kitamura Y Kobayashi M |
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| Affiliation: | Department of Crop and Soil Sciences, Seed Biology, Cornell University Agricultural Experiment Station, Cornell University, Ithaca, NY 14853-1901, USA. |
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| Abstract: | Two digalactosyl D-chiro-inositols and two trigalactosyl D-chiro-inositols, members of the fagopyritol A series and fagopyritol B series, were isolated from buckwheat (Fagopyrum esculentum Moench) seeds. Structures of the first three were determined by 1H and 13C NMR. Fagopyritol B2 is alpha-D-galactopyranosyl-(1-->6)-alpha-D-galactopyranosyl-(1-->2) -1D-chiro-inositol, and fagopyritol A2 is alpha-D-galactopyranosyl-(1-->6)-alpha-D-galactopyranosyl-(1-->3)- 1D-chiro-inositol. Fagopyritol A3, a trigalactosyl D-chiro-inositol, is alpha-D-galactopyranosyl-(1-->6)-alpha-D-galactopyranosyl-(1 -->6) -alpha-D-galactopyranosyl-(1-->3)- 1 D-chiro-inositol. From analysis of hydrolysis products, the second trigalactosyl D-chiro-inositol, fagopyritol B3, isalpha-D-galactopyranosyl-(1-->6)-alpha-D-galactopyranosyl-(1-->6) -alpha-D-galactopyranosyl-(1-->2)-1D-chiro-inositol. |
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