label: a polyvinyl alcohol + 2n Fe(III)-[cytochrome c] = an oxidized polyvinyl alcohol + 2n Fe(II)-[cytochrome c] + 2n H(+)
label_lc: a polyvinyl alcohol + 2n fe(iii)-[cytochrome c] = an oxidized polyvinyl alcohol + 2n fe(ii)-[cytochrome c] + 2n h(+)