Isolation and Characteristic of Chondroitin Sulfate from Grass Carp Scales

Abstract

Papain and alcalase were successively used to hydrolyze grass carp scales for preparation of crude polysaccharide. Chondroitin sulfate were further purified by DEAE-Sepharose Fast Flow and Sepharose 6 Fast Flow gel column chromatograph, and indentified by IR, NMR, element analysis and chemical analysis. Three polysaccharide fractions including chondroitin sulfate were fistly obtained from grass carp scales. The weight-average molecular weight of chondroitin sulfate was 46168 Da. The contents of various elements (C, H, N, S, O) in chondroitin sulfate were 28.89 %, 3.80 %, 3.36 %, 6.71 % and 47.16 %, respectively. The results of IR, NMR and chemical analysis exhibited that the sulfate group in chondroitin sulfate be O-linked in position 4 of N-acetyl-D-galactosamine.