P9118A
Prothrombin Fragment 2
Size
£686.00
- SKU:
- P9118A
- Purity:
- Purified by immunoaffinity chromatography
- Storage Conditions:
- -20°C
- Supplier:
- United States Biological
- Host:
- Sheep
- Immunogen:
- Human Prothrombin (Factor II) purified from plasma.
- Format:
- Supplied as a liquid in 10mM HEPES, pH 7.4, 0.15M sodium chloride, 50% glycerol
- Extra Details:
- Prothrombin (factor II, F.II) is a vitamin K-dependent glycoprotein produced in the liver. The concentration of prothrombin in plasma is ~100ug/ml (~1.4um). Prothrombin is a single chain molecule with a molecular weight of 72kD. Prothrombin consists of a catalytic domain followed by two kringle structures and an amino-terminal domain containing 10 y-carboxy-glutamic acid (gla) residues. These gla residues allow prothrombin to bind to membranes that contain acidic phospholipids in a calcium dependent manner. The binding to membranes is required for effective presentation of prothrombin as a substrate for activation by the prothrombinase complex, which consists of activated factor X, activated cofactor V and calcium on phospholipid membrane. Activation by prothrombinase occurs by sequential cleavage after residue Arg320 then after Arg271 to produce the active protease a-thrombin (37kD) and the by-product prothrombin fragment 1.2 (35kD). The product thrombin further cleaves prothrombin fragment 1.2 after residue Arg155 into individual prothrombin fragments 1 and 2. The activity of a-thrombin in plasma is inhibited primarily by antithrombin and the rate of inhibition is accelerated 1000-fold in the presence of optimal concentrations of heparin. Other physiological inhibitors of thrombin in the absence of heparin include a2macroglobulin and a1antitrypsin. Applications: Suitable for use in ELISA and Immunoelectrophoresis. Other applications not tested. Recommended Dilutions: Optimal dilutions to be determined by the researcher. Storage and Stability: May be stored at 4°C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20°C. Aliquots are stable for 12 months after receipt. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.
- Shipping Conditions:
- Blue Ice