butanal + 2 Fe(III)-[cytochrome c] + H2O <=> butanoate + 2 Fe(II)-[cytochrome c] + 3 H(+)
butanal + 2 fe(iii)-[cytochrome c] + h2o <=> butanoate + 2 fe(ii)-[cytochrome c] + 3 h(+)
butanal + 2 Fe(III)-[cytochrome c] + H2O <=> butanoate + 2 Fe(II)-[cytochrome c] + 3 H(+)
butanal + 2 fe(iii)-[cytochrome c] + h2o <=> butanoate + 2 fe(ii)-[cytochrome c] + 3 h(+)