Abstract
Marine brown algal polysaccharides, especially, fucoidans and laminaran have many biological activities (anticoagulant, antithrombotic, antiviral, and antitumoral). These biological activity related to structure, linkage of sugar residues, sulfate content, position of sulfate and molecular size. Shorter bioactive polymer (higher oligomer) could be obtained by enzymatic depolymerization process. Lytic enzyme β-1, 3-glucanases hydrolyze laminaran
