Term Name:	poly(beta-D-mannuronate) lyase activity
Synonyms:	alginase activity, alginase I, alginate lyase activity, alginate lyase I activity, poly(beta-D-1,4-mannuronide) lyase activity, poly(mana) alginate lyase activity
Definition:	Catalysis of the reaction: polysaccharides containing beta-D-mannuronate residues = oligosaccharides with 4-deoxy-alpha-L-erythro-hex-4-enopyranuronosyl end. This reaction is the eliminative cleavage of polysaccharides containing beta-D-mannuronate residues to give oligosaccharides with 4-deoxy-alpha-L-erythro-hex-4-enopyranuronosyl groups at their ends.
Ontology:	GO: Molecular Function [GO:0045135]    QuickGO    AmiGO