| 3N3B: reference: Structural Basis for Activation of Class Ib Ribonucleotide Reductase., Boal AK, Cotruvo JA Jr, Stubbe J, Rosenzweig AC, Science. 2010 Aug 5. PMID: 20688982 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).