Cysteine
From Wikipedia, the free encyclopedia.

Cysteine is a naturally occurring hydrophilic ("water loving") amino acid which has a sulfhydryl (SH) group and is found in most proteins. When it is exposed to air it oxidizes to form cystine, which is two cysteine molecules joined by a disulfide bond. One molecule of water (H₂O) is the byproduct from the creation of each molecule of cystine.

Symbol: C or Cys

Side chain type: hydrophilic

Mass: 121.16

Isoelectric point: 5.05

External link

• http://www.chemie.fu-berlin.de/chemistry/bio/aminoacid/cystein_en.html

The original article can be found at: http://en.wikipedia.org/wiki/Cysteine.
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