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Cordyceps sinensis, a well-known traditional Chinese medicine, possesses activities in anti-tumour, anti-oxidation and stimulating the immune system; however, the identity of active component(s) is not determined. By using anti-oxidation activity-guided fractionation, a polysaccharide of molecular weight ~210 kDa was isolated from cultured Cordyceps mycelia by ion-exchange and sizing chromatography...
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