Laminarin from Laminaria digitata is a polysaccharide; primarily poly(β-Glc-[1→3]) with some β-(1→6) interstrand linkages and branch points. This is a useful chemical to study the reaction of laminarin with laminarase.Laminarin from Laminaria digitata has been used: · as a stimulant to study its effect on the respiratory burst using haemocytes of P. vannamei · as a carbon source to study its effect on enzyme production using Pichia membranifaciens culture · as a carbon source for Polaribacter sp. culture Laminarin from Laminaria digitata is a polysaccharide; primarily poly(β-Glc-[1→3]) with some β-(1→6) interstrand linkages and branch points. This is a useful chemical to study the reaction of laminarin with laminarase. A storage glucan and substrate for laminarinase