simple assays have been developed for the two uronosyl 5-epimerases which participate in the biosynthesis of heparin and dermatan sulfate ( heparosan n-sulfate d-glucuronosyl 5-epimerase and chondroitin d-glucuronosyl 5-epimerase , respectively ) .
C0011602
dermatan sulfate
C0008454
chondroitin