| Namespace | MPheno.ontology | Obsolete | false |
| description | anomaly in the amount of cysteine, a sulfur-containing amino acid that is propanoic acid with an amino group at position 2 and a sulfanyl group at position 3; the thiol side chain in cysteine is susceptible to oxidation to give the disulfide derivative cystine, which serves an important structural role in many proteins |
