Preliminary structural characterization and hypoglycemic effects of an acidic polysaccharide SERP1 from the residue of Sarcandra glabra

An acidic polysaccharide (SERP1) was isolated from the residue of Sarcandra glabra (Thunb.) Nakai by water extraction and purified by decoloration and ion exchange chromatography. The structure of SERP1 was determined by HPLC, HPSEC-MALLS, FT-IR, and NMR. The results indicated that SERP1 was a homogeneous heteropolysaccharide with the absolute molecular weight of 4.208×104Da in the aqueous phase. 1,4-linked α-d-galacturonic acid, methyl...