label: hydrogen sulfide + 6 oxidized [2Fe-2S]-[ferredoxin] + 3 H2O = sulfite + 6 reduced [2Fe-2S]-[ferredoxin] + 7 H(+)
label_lc: hydrogen sulfide + 6 oxidized [2fe-2s]-[ferredoxin] + 3 h2o = sulfite + 6 reduced [2fe-2s]-[ferredoxin] + 7 h(+)