| 3NYB: reference: Structure and function of the polymerase core of TRAMP, a RNA surveillance complex., Hamill S, Wolin SL, Reinisch KM, Proc Natl Acad Sci U S A. 2010 Aug 9. PMID: 20696927 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).