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Topic summary

Cystine

Cystine
Names IUPAC name
3,3'-Disulfanediylbis(2-ammoniopropanoate)
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard100.000.270
KEGG
UNII
  • InChI=1S/C6H12N2O4S2/c7-3(5(9)10)1-13-14-2-4(8)6(11)12/h3-4H,1-2,7-8H2,(H,9,10)(H,11,12)
    Key: LEVWYRKDKASIDU-UHFFFAOYSA-N
  • InChI=1/C6H12N2O4S2/c7-3(5(9)10)1-13-14-2-4(8)6(11)12/h3-4H,1-2,7-8H2,(H,9,10)(H,11,12)
    Key: LEVWYRKDKASIDU-UHFFFAOYAA
  • C(C(C(=O)O)N)SSCC(C(=O)O)N
Properties C6H12N2O4S2Molar mass240.29 g·mol Hazards Safety data sheet (SDS) External MSDS
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Cystine is the oxidized dimeric derivative of the amino acidcysteine 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.

Wikipedia source