Reaction catalyzed by pectin monosaccharide-lyase (4.2.2.27)

	(1,4-alpha-D-galacturonosyl methyl ester)n	=		(1,4-alpha-D-galacturonosyl methyl ester)n-1	+		4-deoxy-6-O-methyl-L-threo-hex-4-enopyranuronate
	(1,4-alpha-D-galacturonosyl methyl ester)n	=		(1,4-alpha-D-galacturonosyl methyl ester)n-1	+		4-deoxy-6-O-methyl-L-threo-hex-4-enopyranuronate