in all the examinees proteoglycans were isolated from daily urine , their carbohydrate components -- glycosaminoglycans ( gag ) -- were separated and divided into fractions ( keratan sulfate , hyaluronic acid , heparan sulfate , chondroitin sulfate-4 , chondroitin sulfate-6 , dermatan sulfate , and heparin ) by column chromatography on unmodified cellulose .
C0017973
glycosaminoglycans
C0019134
heparin