Superoxide dismutase is an ENZYME which plays a very important role in reducing the activity of peroxides and free oxygen molecule formed at the end of of the cellular respiration.
STRUCTURE OF SOD
The last step of cellular respiration takes place in RAKER PARTIALS of MITOCHONDRIA. After series of reactions NAD, NADP molecules are reduced. As a result, 36 ATP's are formed as assimilatory power molecules. O2 and H2O2 are formed as bi-products. Very unfortunately these molecules are not good for normal functioning of the cell. So these molecules must be converted into simple harmless form. For this process, SOD binds to suitable active center and convert them to simpler form.
SOD performs it's work accurately without committing any mistake.
WE MUST THANK FULL TO IT, HATS OFF SOD........