Reaction catalyzed by oligogalacturonide lyase (4.2.2.6)

		=			+
	4-O-(4-deoxy-alpha-L-threo-hex-4-enopyranuronosyl)-beta-D-galactopyranuronic acid	=		4-deoxy-alpha-L-threo-hex-4-enopyranuronic acid	+		D-galacturonic acid