Destroys radicals which are normally produced within the cells and which are toxic to biological systems. CATALYTIC ACTIVITY: 2 superoxide + 2 H+ = O2 + H2O2. COFACTOR: Binds 1 copper ion per subunit. COFACTOR: Binds 1 zinc ion per subunit. SUBUNIT: Homotetramer.
Suitable for use in Western Blot and Immunohistochemistry. Other applications not tested.
Optimal dilutions to be determined by the researcher.
Secreted protein; extracellular space. Note=99% of EC-SOD is anchored to heparan sulfate proteoglycans in the tissue interstitium, and 1% is located in the vasculature in quilibrium between the plasma and the endothelium.
Major SOD isoenzyme in extracellular fluids such as plasma, lymph and synovial fluid. POLYMORPHISM: The variant Gly-231 which is found in about 2.2% of individual displays a 10-fold increased plasma EC-SOD content due to reduced heparin-binding affinity and thus the impairment of its binding ability to endothelial cell surface. Belongs to the Cu-Zn superoxide dismutase family.
Storage and Stability:
May be stored at 4 degrees C for short-term only. For long-term storage and to avoid repeated freezing and thawing, add sterile glycerol (40-50%), aliquot and store at -20 degrees C. Aliquots are stable for at least 12 months at -20 degrees C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.