Biologically Active Substance
cysteine Audio
cys·te·ine [ sis-tee-een, -in ]
Brand Names:
Amino-Cerv; Elcys; FreAmine 6.9; Freamine III 10; Hepatamine 8; Nephramine; Nouress; PremaSol; ProcalAmine 3; Trophamine 10 %; Trophamine 6 %
More Information:
ChemID; DrugBank; DailyMed; DrugInfo; PDR
Definitions related to cysteine:
  • A non-essential sulfur-containing amino acid in humans, related to cystine, Cysteine is important for protein synthesis, detoxification, and diverse metabolic functions. Found in beta-keratin, the main protein in nails, skin, and hair, Cysteine is important in collagen production, as well as skin elasticity and texture. Also required in the manufacture of amino acid taurine, Cysteine is a component of the antioxidant glutathione, and plays a role in the metabolism of essential biochemicals such as coenzyme A, heparin, and biotin. (NCI04)
    NCI Thesaurus
    U.S. National Cancer Institute, 2021
  • A thiol-containing non-essential amino acid that is oxidized to form CYSTINE.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2021
  • Amino acid with side chain -CH2SH.
    CRCH Nutrition Terminology
    Cancer Research Center of Hawaii, University of Hawaii, 2021
  • Primary aminoacid with the side group -CH2SH, capable of forming disulfide bonds (cystine) with other cysteine residues to stabilize protein tertiary and oligomeric structure.
    CRISP Thesaurus
    National Institutes of Health, 2006
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