Reaction catalyzed by alpha-amylase (3.2.1.1)

		+		H2O	=			+
	(alpha-D-glucopyranosyl-(1-4))n-alpha-D-glucopyranose	+		H2O	=		(alpha-D-glucopyranosyl-(1-4))n-m-alpha-D-glucopyranose	+		(alpha-D-glucopyranosyl-(1-4))m-alpha-D-glucopyranose