Hydroxyl radical

Rhamnose

Chromatography

Galactose

Biochemistry

Monosaccharide

Food science

Polysaccharide

Organic chemistry

Antioxidant

Enzyme

Arabinose

Molecular mass

Chemistry

Xylose

DPPH

Fermentation

International Journal of Biological Macromolecules

Polysaccharides from cultivated Saussurea involucrata (CSIP) were purified, two major fractions (CSIP1-2 and CSIP2-3) were investigated for their molecular weights, monosaccharide compositions and in vitro antioxidant activities. The results suggested that the molecular weights of CSIP1-2 and CSIP2-3 were approximately 163.5 kDa and 88.6 kDa, respectively. CSIP1-2 was composed of glucose, galactose, xylose, rhamnose, arabinose and galacturonic acid with a molar ratio of 1.651:0.39:0.062:8.331:1.759:40.426. CSIP2-3 was composed of glucose, galactose, xylose, rhamnose, arabinose and galacturonic acid with a molar ratio of 0.762:0.657:0.112:5.587:0.318:44.655. Different scavenging activities on superoxide radical, DPPH radical and hydroxyl radical were observed in CSIP1-2 and CSIP2-3 at tested concentrations.

Composition and antioxidant activity of the polysaccharides from cultivated Saussurea involucrata