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Reactions of oxygen molecule in biology III. 4. Decomposition of H2O2 (or peroxides): - through reduction: peroxidases H2O2 + SH2 â S + 2 H2O - through disproportionation: catalases 2 H2O2 â 2H2O + O2 5. Decomposition of the superoxide radical anion: superoxide dismutase â through disproportionation 2 O2- â O2 + O22e.g. CuZn-SOD, Fe(Mn)-SOD, ...
