Annexin V (human, rec.)

Recombinant human annexin V fused to a GST-tag. Lyophilized. In PBS, pH 7.4. Binds to phosphatidylserine (PS). Annexin V is an anticoagulant protein that acts as an indirect inhibitor of the thromboplastin-specific complex, which is involved in the blood coagulation cascade. Annexin V competes for phosphatidylserine binding sites (e.g. platelets) with prothrombin or coagulation factors and inhibits the activity of phospholipase A1. Antibodies directed against annexin V are found in patients with a disease called the antiphospholipid syndrome(APS), a thrombophilic disease associated with autoantibodies against phospholipid compounds. Annexin V is used as a probe in the 'annexin V affinity assay' to detect cells that have expressed phosphatidylserine on the cell surface, a feature found in apoptosis and other forms of cell death.