Reaction catalyzed by glycoprotein 2-beta-D-xylosyltransferase (2.4.2.38)

		+			=			+
	UDP-D-xylose	+		D-mannosyl-alpha-(1,3)-D-mannose	=		UDP	+		D-xylosyl-beta-(1,2)-D-mannosyl-alpha-(1,3)-D-mannose