L-cystine
Sign in to saveCystine is the oxidized derivative of the amino acid cysteine and has the formula (SCH2CH(NH2)CO2H)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.
Article
10 sectionsContents
- Formation and reactions
- Structure
- Occurrence
- History
- Redox
- Cystine-based disorders
- Biological transport
- See also
- References
- External links
Cystine is the oxidized derivative of the amino acid cysteine and has the formula (SCH2CH(NH2)CO2H)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.
==Formation and reactions== ===Structure=== Cystine is the disulfide derived from the amino acid cysteine. The conversion can be viewed as an oxidation: