A comparative analysis of four kinds of polysaccharides purified from Furcellaria lumbricalis |
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Authors: | Yu Guangli Yang Bo Ren Weina Zhao Xia Zhang Junzeng and Barrow Colin |
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Institution: | (1) Lab of Glycochemistry and Glycoengineering, Marine Food and Drug Institute, Ocean University of China, Qingdao, 266003, P. R. China;(2) Ocean Nutrition Canada Ltd. Dartmouth, Nova Scotia, B2Y 4T6, Canada |
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Abstract: | Four kinds of polysaccharides (FA, FB, FC and FD) were extracted and purified from a red alga Furcellaria lumbricalis. Their monosaccharide composition, average molecular mass
and structural feature were determined by gas chromatography (GC), high performance gel permeation chromatography (HPGPC)
and Fourier transform infrared spectroscopy (FTIR), respectively. The results showed that FA and FB were composed of galactose
(Gal), 3,6-anhydro-galactose (AnG) and 4-sulfated-galactose (G4S), which were structurally similar to β-carrageenan and κ-carrageenan.
FC was composed of sulfated galactose and small amount of AnG, indicating that it was a hybrid-sulfated galactan. FD was composed
of α-1,4-glucose and belonged to floridean starch. The respective yields of FA, FB, FC and FD were 4.84%, 33.74%, 8.76% and
13.5%, and the corresponding
were 537 kD, 432 kD, 513 kD and 51 kD respectively. Owning to its high content (>60%) of polysaccharide, F. lumbricalis will be a good source of marine sulfated polysaccharide and shows its potential utilization in food and medicine. |
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Keywords: | Furcellaria lumbricalis sulfated galactan carrageenan floridean starch |
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