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The crude polysaccharides (GFP) were isolated from the fruiting bodies of Grifola frondosa and purified by DEAE cellulose-52 chromatography and Sephadex G-100 size-exclusion chromatography in that order. Three main fractions, GFP-1, GFP-2 and GFP-3, were obtained through the isolation and purification steps. Then the antioxidant activities of these three fractions were investigated in vitro. The results...
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