Reaction catalyzed by galacturonan 1,4-alpha-galacturonidase (3.2.1.67)

		+		H2O	=			+
	GalAalpha(1->4)GalAalpha(1->4)GalA	+		H2O	=		GalAalpha(1->4)GalA	+		D-galacturonic acid