N-formylmethanofuran + 2 oxidized [2Fe-2S]-[ferredoxin] + H2O = methanofuran + 2 reduced [2Fe-2S]-[ferredoxin] + CO2 + H(+)
n-formylmethanofuran + 2 oxidized [2fe-2s]-[ferredoxin] + h2o = methanofuran + 2 reduced [2fe-2s]-[ferredoxin] + co2 + h(+)