Platelet Factor 3

**Definition:** A phospholipid from the platelet membrane that contributes to the blood clotting cascade by forming a phospholipid-protein complex (THROMBOPLASTIN) which serves as a cofactor with FACTOR VIIA to activate FACTOR X in the extrinsic pathway of BLOOD COAGULATION.

**Tree numbers:** - D12.776.124.125.691 - D23.119.932

**Synonyms:** - PF 3