Biologically Active Substance
cystine Audio
cys·tine [ sis-teen, -tin ]
More Information:
ChemID; DrugBank; DailyMed; DrugInfo; PDR
Definitions related to cystine:
  • A covalently linked dimeric nonessential amino acid formed by the oxidation of CYSTEINE. Two molecules of cysteine are joined together by a disulfide bridge to form cystine.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2021
  • Disulfide dimer of cysteine.
    CRISP Thesaurus
    National Institutes of Health, 2006
  • Not considered one of the 20 amino acids, Cystine is a sulfur-containing derivative obtained from oxidation of cysteine amino acid thiol side chains. It functions as an antioxidant and protects tissues against radiation and pollution, slowing the aging process. It also aids protein synthesis. Cystine is abundant in many proteins of skeletal tissues and skin, and found in insulin and digestive enzymes chromotrypsinogen A, papain, and trypsinogen. (NCI04)
    NCI Thesaurus
    U.S. National Cancer Institute, 2021
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