label: biliverdin IXalpha + 2 reduced [2Fe-2S]-[ferredoxin] + 2 H(+) => (3Z)-phytochromobilin + 2 oxidized [2Fe-2S]-[ferredoxin]
label_lc: biliverdin ixalpha + 2 reduced [2fe-2s]-[ferredoxin] + 2 h(+) => (3z)-phytochromobilin + 2 oxidized [2fe-2s]-[ferredoxin]