S-sulfanyl-L-cysteinyl-[cysteine desulfurase] + (sulfur carrier)-H <=> L-cysteinyl-[cysteine desulfurase] + (sulfur carrier)-SH
s-sulfanyl-l-cysteinyl-[cysteine desulfurase] + (sulfur carrier)-h <=> l-cysteinyl-[cysteine desulfurase] + (sulfur carrier)-sh
S-sulfanyl-L-cysteinyl-[cysteine desulfurase] + (sulfur carrier)-H <=> L-cysteinyl-[cysteine desulfurase] + (sulfur carrier)-SH
s-sulfanyl-l-cysteinyl-[cysteine desulfurase] + (sulfur carrier)-h <=> l-cysteinyl-[cysteine desulfurase] + (sulfur carrier)-sh