Reaction catalyzed by beta-glucuronidase (3.2.1.31)

		+		H2O	=			+
	ammonium 1-deoxy-1-(6-thiopurinyl)-beta-D-glucopyranosidurate	+		H2O	=		6-mercaptopurine	+		ammonium 1-deoxy-(6-thiopurinyl)-beta-D-glucopyranosiduronate