Reaction catalyzed by GDP-mannose:alpha-L-Rha-(1->3)-alpha-D-Gal-PP-Und alpha-1,4-mannosyltransferase (2.4.1.378)

		+			=			+
	GDP-alpha-D-mannose	+		alpha-L-Rha-(1->3)-alpha-D-Gal-PP-Und	=		GDP	+		alpha-D-Man-(1->4)-alpha-L-Rha-(1->3)-alpha-D-Gal-PP-Und