Cystine

Cystine is a diaminodicarboxylic sulfur-containing amino acid that is formed in protein by the oxidation of the sulfhydryl groups of two cysteine ​​residues to form a disulfide bond. This disulfide bond forms the tertiary structure of the protein molecule.

Cystine plays an important role in maintaining the correct spatial structure of proteins. Due to the formation of disulfide bonds, cystine stabilizes the protein conformation. In addition, cystine is involved in the regulation of redox processes in the cell. Disturbances in cystine metabolism can lead to various diseases associated with connective tissue pathology.