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

		+			=			+
	UDP-xylose	+		mannosyl-alpha-(1,3)-mannosyl-alpha-(1,4)-galactosyl-beta-(1,6)-mannosyl-alpha-(1,2)-inositol phosphorylceramide	=		UDP	+		mannosyl-alpha-(1,3)-[xylosyl-beta-(1,2)]-mannosyl-alpha-(1,4)-galactosyl-beta-(1,6)-mannosyl-alpha-(1,2)-inositol phosphorylceramide