Fe(II)-heme b-[protein] + nitric oxide + O2 = Fe(III)-heme b-[protein] + nitrate
fe(ii)-heme b-[protein] + nitric oxide + o2 = fe(iii)-heme b-[protein] + nitrate
Fe(II)-heme b-[protein] + nitric oxide + O2 = Fe(III)-heme b-[protein] + nitrate
fe(ii)-heme b-[protein] + nitric oxide + o2 = fe(iii)-heme b-[protein] + nitrate