Standard Article


  1. August Böck

Published Online: 3 MAY 2005

DOI: 10.1038/npg.els.0003891



How to Cite

Böck, A. 2005. Selenocysteine. eLS. .

Author Information

  1. University of Munich, Munich, Germany

Publication History

  1. Published Online: 3 MAY 2005

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The trace element selenium is present in the form of selenocysteine in selected proteins of organisms from all three lines of descent. Selenocysteine incorporation is DNA-encoded, determined by the UGA codon, and occurs via a unique mechanism representing an expansion of the genetic code.


  • selenoproteins;
  • SelB;
  • selenocysteyl-tRNA;
  • SECIS;
  • recoding