Reaction catalyzed by initiation-specific alpha-1,6-mannosyltransferase (2.4.1.232)

		+			=			+
	GDP-mannose	+		Manalpha(1-3)Manalpha(1-2)Manalpha(1-3)Manalpha(1-2)Man	=		GDP	+		Manalpha(1-3)[Manalpha(1-6)]Manalpha(1-2)Manalpha(1-2)Manalpha(1-2)Man