1GP1:
reference: The refined structure of the selenoenzyme glutathione peroxidase at 0.2-nm resolution., Epp O, Ladenstein R, Wendel A, Eur J Biochem. 1983 Jun 1;133(1):51-69. PMID: 6852035

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).