Reaction catalyzed by arachidonate 15-lipoxygenase (1.13.11.33)

		+			=			+
	arachidonic acid	+		O2	=		(15S)-hydroperoxy-(5Z,8Z,11Z,13E)-eicosatetraenoic acid	+		(12S,5Z,8Z,10E,14Z)-12-hydroperoxyeicosa-5,8,10,14-tetraenoic acid