Description_x000D_ General description_x000D_ Factor IX is a 55 kDa single chain vitamin K-dependent plasma zymogen which plays a key role in the intrinsic and extrinsic blood coagulation systems._x000D_ Application_x000D_ Factor IX is plasma zymogen key to blood coagulation systems. It has been used in studies of portal vein thrombosis (PVT) in hepatocellular carcinoma (HCC). It has been found that abnormalities in factor IX contribute to PVT in HCC patients. Additionally, it has been used in studies of changes in the coagulation system in patients with inflammatory bowel disease (IBD)._x000D_ Linkage_x000D_ View this factors role in the Coagulation Cascade_x000D_ Unit Definition_x000D_ One unit is equivalent to the Factor IX activity in 1.0 mL of normal human plasma at pH 7.4 at 37 °C._x000D_ Physical form_x000D_ Aqueous solution containing 50% (v/v) glycerol