| 3EJ5: reference: The X-ray structure of ricin A chain with a novel inhibitor., Bai Y, Monzingo AF, Robertus JD, Arch Biochem Biophys. 2009 Mar 1;483(1):23-8. Epub 2008 Dec 30. PMID: 19138659 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).