label: S-sulfanyl-L-cysteinyl-[protein] + [thioredoxin]-dithiol = [thioredoxin]-disulfide + L-cysteinyl-[protein] + hydrogen sulfide + H(+)
label_lc: s-sulfanyl-l-cysteinyl-[protein] + [thioredoxin]-dithiol = [thioredoxin]-disulfide + l-cysteinyl-[protein] + hydrogen sulfide + h(+)