| 3H7S: reference: Crystal structures of Lys-63-linked tri- and di-ubiquitin reveal a highly extended chain architecture., Weeks SD, Grasty KC, Hernandez-Cuebas L, Loll PJ, Proteins. 2009 Aug 12. PMID: 19731378 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).