期刊
CARBOHYDRATE POLYMERS
卷 86, 期 2, 页码 844-851出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2011.05.031
关键词
Ganoderma lucidum; Polysaccharide; Water-soluble; Structure; Anti-tumor activities; Degree of branching
资金
- National Natural Science Foundation of China [30530850]
- National Natural Science Foundation [20874079]
- High-Technology Research and Development Program of China [2006AA02Z102]
Five water-soluble heteropolysaccharides designated GL-I to GL-V, were isolated from the cultured fruit body of Ganoderma lucidum. Using a range of techniques the samples are shown to be heteropolysaccharides, mainly composed of glucose, galactose, mannose, arabinose with the relatively low weight-average molecular weights of 6.1 x 10(4) to 18.4 x 10(4). The amount of uronic acid present is low. As successive isolations proceed to give GL-I to GL-V, the content of glucan increased, the content of galactan and mannan decreased, and the branching decreased from high to near linear. GL-I is most branched of the heteropolysaccharides with a 27.0% degree of branching. whereas GL-V is mainly a linear glucan. Due to their branched chains samples GL-I to GL-III are in a compact coil conformation in 0.9% NaCl at 25 degrees C, whereas GL-V has a slightly flexible chain. Atomic force microscopy images confirmed the spherical shape of samples GL-I to GL-III in water. (C) 2011 Elsevier Ltd. All rights reserved.
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