label: heme b + 3 reduced [NADPH--hemoprotein reductase] + 3 O2 = biliverdin IXalpha + CO + Fe(2+) + 3 oxidized [NADPH--hemoprotein reductase] + 3 H2O + H(+)
label_lc: heme b + 3 reduced [nadph--hemoprotein reductase] + 3 o2 = biliverdin ixalpha + co + fe(2+) + 3 oxidized [nadph--hemoprotein reductase] + 3 h2o + h(+)