How to Buy Von Willebrand factor

Von Willebrand factor (vWF) is a blood glycoprotein involved in hemostasis.
It is deficient or defective in von Willebrand disease and is involved in a large number of other diseases, including thrombotic thrombocytopenic purpura, Heyde's syndrome, and possibly hemolytic-uremic syndrome. It affects your blood's ability to clot. If your blood doesn't clot, you can have heavy, hard-to-stop bleeding after an injury. The bleeding can damage your internal organs. Rarely, the bleeding may even cause death.
A von Willebrand factor (vWF) antigen test measures the quantity of a protein called von Willebrand factor that helps blood to clot. A clot is a lump of blood that the body produces to prevent excessive bleeding by sealing leaks in blood vessels caused by wounds, cuts, scratches, and other conditions.
Von Willebrand factor is not an enzyme and therefore has no catalytic activity.
Its primary function is binding to other proteins, particularly Factor VIII and it is important in platelet adhesion to wound sites. The von Willebrand factor antigen test is usually run together with the ristocetin cofactor test and the factor VIII activity assay, forming the von Willebrand disease profile.
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