KEGG:R04607

UDP-glucuronate + 3-beta-D-Galactosyl-4-beta-D-galactosyl-O-beta-D-xylosylprotein <=> UDP + 3-beta-D-Glucuronosyl-3-beta-D-galactosyl-4-beta-D-galactosyl-O-beta-D-xylosylprotein