Patent 7691810 was granted and assigned to Kyowa Hakko Kirin on April, 2010 by the United States Patent and Trademark Office.
The present invention provides a process for producing an antithrombin III composition comprising an antithrombin III molecule having complex type N-glycoside-linked sugar chains, wherein the complex type N-glycoside-linked sugar chains have a structure in which fucose is not bound to N-acetylglucosamine in the reducing end in the sugar chains.