2 Fe(III)-[cytochrome] + nicotinate + H2O => 2 Fe(II)-[cytochrome] + 6-hydroxynicotinate + 2 H(+)
2 fe(iii)-[cytochrome] + nicotinate + h2o => 2 fe(ii)-[cytochrome] + 6-hydroxynicotinate + 2 h(+)
2 Fe(III)-[cytochrome] + nicotinate + H2O => 2 Fe(II)-[cytochrome] + 6-hydroxynicotinate + 2 H(+)
2 fe(iii)-[cytochrome] + nicotinate + h2o => 2 fe(ii)-[cytochrome] + 6-hydroxynicotinate + 2 h(+)