Abstract
A marine microalga, Gymnodinium A3 OKU-1 strain, which was originally isolated from a water sample of the Seto Inland Sea produced an extracellular acidic polysaccharide when grown in a seawater medium. Isolation and purification of this polysaccharide were accomplished by precipitation with ethanol and Cetavlon, followed by fractionation with DEAE-cellulose column chromatography. This polysaccharide preparation, which was homogeneous in both ultracentrifugal and electrophoretic analyses, was composed of galactan containing sulfate and lactate as the components.
