| 2PJO: reference: Fragment-based identification of determinants of conformational and spectroscopic change at the ricin active site., Carra JH, McHugh CA, Mulligan S, Machiesky LM, Soares AS, Millard CB, BMC Struct Biol. 2007 Nov 6;7(1):72. PMID: 17986339 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).