5-hexynoyl-[ACP] + 2 oxidized [2Fe-2S]-[ferredoxin] + 2 H2O => 5-hexenoyl-[ACP] + 2 reduced [2Fe-2S]-[ferredoxin] + O2 + 2 H(+)
5-hexynoyl-[acp] + 2 oxidized [2fe-2s]-[ferredoxin] + 2 h2o => 5-hexenoyl-[acp] + 2 reduced [2fe-2s]-[ferredoxin] + o2 + 2 h(+)