S-sulfosulfanyl-L-cysteinyl-[SoxY protein] + H2O => S-sulfanyl-L-cysteinyl-[SoxY protein] + sulfate + H(+)
s-sulfosulfanyl-l-cysteinyl-[soxy protein] + h2o => s-sulfanyl-l-cysteinyl-[soxy protein] + sulfate + h(+)