Glucuronyl-Galactosyl-Proteoglycan 4-Alpha-N-Acetylglucosaminyltransferase Activity

Glucuronosylgalactosyl-Proteoglycan 4-Alpha-N-Acetylglucosaminyltransferase Activity

Catalysis of the reaction: UDP-N-acetyl-D-glucosamine + beta-D-glucuronosyl-(1->3)-beta-D-galactosyl-(1->3)-beta-D-galactosyl-(1->4)-beta-D-xylosyl-proteoglycan = UDP + alpha-N-acetyl-D-glucosaminyl-(1->4)-beta-D-glucuronosyl-(1->3)-beta-D-galactosyl.