from the guanidinium chloride extract two pgs were isolated by ion-exchange and gel-permeation chromatography : proteochondroitin sulphate ( pgi ) with a protein-core apparent mr of 250 000 and proteodermatan-chondroitin sulphate ( pgii ) with a protein-core apparent mr of 55 000 .
C0033692
pgs
C0033689
proteochondroitin sulphate