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Superoxide dismutases (SODs) protect cells against oxidative stress by disproportionating O2− to H2O2 and O2. The recent finding of a nickel-containing SOD (Ni-SOD) has widened the diversity of SODs in terms of metal contents and SOD catalytic mechanisms. The coordination and geometrical structure of the metal site and the related electronic structure are the keys to understanding the dismutase mechanism...
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