L-cystine = S-sulfanyl-L-cysteine + 2-aminoprop-2-enoate
l-cystine = s-sulfanyl-l-cysteine + 2-aminoprop-2-enoate
L-cystine = S-sulfanyl-L-cysteine + 2-aminoprop-2-enoate
l-cystine = s-sulfanyl-l-cysteine + 2-aminoprop-2-enoate