Coagulation

Using X-ray crystallography, researchers at St. Louis University have published the first ever image of the important blood clotting protein known as prothrombin (coagulation factor II). The flexible structure of the protein is a key component in the development of blood clotting. [Courtesy of Saint Louis University].

How does blood clot in the body?

red blood cells From Wikimedia Commons

Anti-inflammatory drugs impair aspirin's ability to inhibit blood clotting