2 Fe(II)-[cytochrome] + nitrate + 2 H(+) => 2 Fe(III)-[cytochrome] + nitrite + H2O
2 fe(ii)-[cytochrome] + nitrate + 2 h(+) => 2 fe(iii)-[cytochrome] + nitrite + h2o
2 Fe(II)-[cytochrome] + nitrate + 2 H(+) => 2 Fe(III)-[cytochrome] + nitrite + H2O
2 fe(ii)-[cytochrome] + nitrate + 2 h(+) => 2 fe(iii)-[cytochrome] + nitrite + h2o