Reaction catalyzed by mannuronate-specific alginate lyase (4.2.2.3), guluronate-specific alginate lyase (4.2.2.11)

		=		4-deoxy-alpha-L-erythro-hex-4-enopyranuronosyl-(1,4)-beta-oligo(beta-(1,4)-D-mannuronate)
	poly(beta-(1,4)-D-mannuronate)	=		4-deoxy-alpha-L-erythro-hex-4-enopyranuronosyl-(1,4)-beta-oligo(beta-(1,4)-D-mannuronate)