Cystine dehydrase
Cystine dehydrase is an enzyme that catalyzes the dehydrogenation of cystine to form cystide.
A peptide containing cystine (for example, homocysteine), as a result of methylation with methionine, is converted into cystidine-S-methionine. When the cystamine residue is reduced to methionine, S-kininase-II is formed. The resulting cystamine