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 => s-sulfanyl-l-cysteinyl-[cysteine desulfurase] + (sulfur carrier)-h