Reaction catalyzed by glucuronosyl-N-acetylglucosaminyl-proteoglycan 4-alpha-N-acetylglucosaminyltransferase (2.4.1.224)

		+			=
	UDP-N-acetyl-alpha-D-glucosamine	+		D-Man-alpha-(1->2)-D-Man-alpha-(1->3)-[D-Man-(alpha-(1->2)-D-Man-alpha-(1->6)]-D-Man-alpha-(1->6)-[D-Man-(alpha-(1->2)-D-Man-(alpha-(1->2)-D-Man-alpha-(1->3)]-D-Man-beta-(1->4)-D-GlcNAc	=		UDP D-Man-alpha-(1->2)-D-Man-alpha-(1->3)-[D-Man-(alpha-(1->2)-D-Man-alpha-(1->6)]-[D-GlcNAc-beta-(1->4)]-D-Man-alpha-(1->6)-[D-Man-(alpha-(1->2)-D-Man-(alpha-(1->2)-D-Man-alpha-(1->3)]-D-Man-beta-(1->4)-D-GlcNAc