| 2PN4: reference: Structure of hepatitis C virus IRES subdomain IIa., Zhao Q, Han Q, Kissinger CR, Hermann T, Thompson PA, Acta Crystallogr D Biol Crystallogr. 2008 Apr;64(Pt 4):436-43. Epub 2008, Mar 19. PMID: 18391410 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).