(R)-lactate + 2 Fe(III)-[cytochrome c] => 2 Fe(II)-[cytochrome c] + pyruvate + 2 H(+)
(r)-lactate + 2 fe(iii)-[cytochrome c] => 2 fe(ii)-[cytochrome c] + pyruvate + 2 h(+)
(R)-lactate + 2 Fe(III)-[cytochrome c] => 2 Fe(II)-[cytochrome c] + pyruvate + 2 H(+)
(r)-lactate + 2 fe(iii)-[cytochrome c] => 2 fe(ii)-[cytochrome c] + pyruvate + 2 h(+)