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Biological oxidation of manganese via superoxide and nitrite oxidation by the product manganese oxide. These reactions are taken from references 24 (manganese oxidation) and 47 (nitrite oxidation). Note that only representative reactions are presented. For instance, the text refers to a mixed oxide (MnOX), while this reaction scheme simplifies to MnO2. The cellular reductant (cell. reductant) which serves as electron donor for superoxide production is not unambiguously identified.
