Definition of Selenocysteine

Selenocysteine: An amino acid in which selenium takes the place of sulfur in the amino acid cysteine. Its formula is H-Se-CH2-CH(NH2)-COOH. Selenocysteine is an essential component of selenium-containing proteins, or selenoproteins.


Last Editorial Review: 6/14/2012

Search MedTerms:


Back to MedTerms online medical dictionary A-Z List
Pill Identifier Tool

Need help identifying pills and medications?
Use the pill finder tool on RxList.