Patent ID: 6365733
Filing Date: 2002-04-02
Classification: C07H,C12P

Abstract:
An oligosaccharide obtained by a method comprising adjusting a sulfate group content of keratan sulfate, allowing an enzyme having an ability to cleave a glycosidic linkage of keratan sulfate to act on the keratan sulfate with the adjusted sulfate group content to obtain a product, and then completely desulfating the product,wherein the oligosaccharide has the following physical and chemical properties:a galactose residue content measured by an anthrone method is 35 to 50% by weight; a nitrogen content measured by elemental analysis is 3 to 4% by weight; and a molecular weight measured by mass spectrometry is 1,000 to 2,200, with the proviso that the oligosaccharide is not (Gal-GlcNAc)3 or (Gal-GlcNAc)4.