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Cysteine (/ ˈ s ɪ s t ɪ iː n /; [5] symbol Cys or C [6]) is a semiessential [7] proteinogenic amino acid with the formula HOOC−CH(−NH 2)−CH 2 −SH. The thiol side chain in cysteine enables the formation of disulfide bonds, and often participates in enzymatic reactions as a nucleophile. Cysteine is chiral, but both D and L-cysteine ...
Cystine is the oxidized derivative of the amino acid cysteine and has the formula (SCH 2 CH(NH 2)CO 2 H) 2.It is a white solid that is poorly soluble in water. As a residue in proteins, cystine serves two functions: a site of redox reactions and a mechanical linkage that allows proteins to retain their three-dimensional structure.
This page was last edited on 18 July 2006, at 19:25 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may ...
γ-L-Glutamyl-L-cysteine, also known as γ-glutamylcysteine (GGC), is a dipeptide found in animals, plants, fungi, some bacteria, and archaea. It has a relatively unusual γ-bond between the constituent amino acids , L -glutamic acid and L -cysteine and is a key intermediate in the γ-glutamyl cycle first described by Meister in the 1970s.
Cystinosis is a lysosomal storage disease characterized by the abnormal accumulation of cystine, the oxidized dimer of the amino acid cysteine. [3] It is a genetic disorder that follows an autosomal recessive inheritance pattern.
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Cysteine metabolism refers to the biological pathways that consume or create cysteine. The pathways of different amino acids and other metabolites interweave and overlap to creating complex systems. The pathways of different amino acids and other metabolites interweave and overlap to creating complex systems.
Chemical formula: C 3 H 7 N O 2 S Molar mass: 121.16 g·mol −1 Systematic name: (2R)-2-amino-3-sulfanyl-propanoic acid Abbreviations: C, Cys Synonyms: 2-amino-3-mercaptopropanoic acid