The inactive precursor of thrombin that is formed in the liver and present normally in the plasma. Its formation depends upon adequate vitamin K.
an inactive protein synthesized by the liver, released into the blood, and converted to active thrombin in the process of blood clotting
A protein in blood plasma that is converted to thrombin during the clotting process.
a protein in blood plasma that is the inactive precursor of thrombin
source of thrombin in blood coagulation.
A substance produced by the liver that helps with clotting; prothrombin time is a blood test that indirectly measures the ability of the liver to produce prothrombin.
A plasma protein that is the inactive precursor of thrombin. It is converted to thrombin by a prothrombin activator complex consisting of factor Xa, factor V, phospholipid, and calcium ions. Deficiency of prothrombin leads to hypoprothrombinemia.
The most important clotting factor. You need Vitamin K to make it.
A substance found in circulating blood that interacts with calcium salts to form thrombin, necessary for blood clotting.
Factor II, a protein in the blood that is converted to thrombin in the coagulation process
A coagulation (clotting) factor that is needed for the normal clotting of blood. A cascade of biochemical events leads to the formation of the final clot. In this cascade, prothrombin is a precursor to thrombin . See the entire definition of Prothrombin
time/international normalized ratio (PT/INR): A standardized blood test that is used to measure the ability of the blood to clot. Used to monitor degrees of anticoagulation. The INR is mathematically calculated from a PT time. This test helps doctors adjust the dose of warfarin as needed. Back to Previous Page
time a test used to measure the activity of clotting factors I, II, V, VII, and X. Deficiency of any of these factors leads to a prolongation of the prothrombin time. The test is basic to any study of the coagulation process, and it helps in establishing and maintaining anticoagulant therapy.
clotting factor II; one of the 13 chemical components of the blood that create the clotting mechanism
Plasma protein that, when activated by clotting factors, catalyses conversion of fibrinogen to fibrin.
protein needed for clotting of the blood