Reaction catalyzed by cathepsin D (3.4.23.5)

		+		H2O	=			+
	Gly-L-Phe-L-Leu-Gly-L-Phe-L-Leu	+		H2O	=		Gly-L-Phe-L-Leu-Gly	+		L-Phe-L-Leu