label: [DsrC protein]-S-sulfanyl-L-cysteine/L-cysteine + 2 A + 3 H2O = [DsrC protein]-dithiol + sulfite + 2 AH2 + 2 H(+)
label_lc: [dsrc protein]-s-sulfanyl-l-cysteine/l-cysteine + 2 a + 3 h2o = [dsrc protein]-dithiol + sulfite + 2 ah2 + 2 h(+)