A novel macromolecular polysaccharide VGPⅠ-a was purified from Volvariella volvacea fruiting bodies with ultrasound-assisted extraction, ion exchange and gel chromatography. VGPⅠ-a was proved as a α- glucan with Mw of 1435.6 kDa and contained a 1,4-linked d-Glcp backbone with the substitution at C-6 with 1-linked d-Glcp residue.
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