2NOK:
reference: Functional architecture of HCV IRES domain II stabilized by divalent metal ions in the crystal and in solution., Dibrov SM, Johnston-Cox H, Weng YH, Hermann T, Angew Chem Int Ed Engl. 2007;46(1-2):226-9. PMID: 17131443

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).