Reaction catalyzed by lipopolysaccharide heptosyltransferase I (2.4.99.23)

		+			=		ADP	+
	ADP-L-glycero-beta-D-manno-heptose	+		an alpha-Kdo-(2->4)-alpha-Kdo-(2->6)-[lipid A]	=		ADP	+		an alpha-Hep-(1->5)-[alpha-Kdo-(2->4)]-alpha-Kdo-(2->6)-[lipid A]