Proaccelerin is a blood clotting protein also known as factor V. This protein plays a crucial role in activating other components involved in blood coagulation. Synonyms for proaccelerin include coagulation factor V, FV, and plasma thromboplastin component. Coagulation factor V is primarily produced in the liver and is essential in the maintenance of normal hemostasis. The deficiency of this protein results in a bleeding disorder known as Factor V deficiency. Factor V is an essential component of the coagulation cascade, and its dysregulation can result in various diseases related to clotting. In summary, proaccelerin or coagulation factor V is an essential protein in the clotting process that plays a fundamental role in the maintenance of normal hemostasis.