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.

Also Known As:

Factor II; Blood Coagulation Factor II; Differentiation Reversal Factor; Factor II, Coagulation; Factor, Differentiation Reversal; II, Coagulation Factor; Coagulation Factor II; Blood-coagulation factor II

Enzymes and Coenzymes: 1
- Enzyme Precursors: 734
  - Prothrombin: 5323
Amino Acids, Peptides, and Proteins: 1
- Proteins: 496323
  - Blood Proteins: 12679
    - Blood Coagulation Factors: 5500
      - Prothrombin: 5323
  - Protein Precursors: 37
    - Enzyme Precursors: 734
      - Prothrombin: 5323
Biological Factors: 2560
- Blood Coagulation Factors: 5500
  - Prothrombin: 5323

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