| 1NBR: reference: Refined solution structure of the iron-responsive element RNA using residual dipolar couplings., McCallum SA, Pardi A, J Mol Biol 2003 Feb 28;326(4):1037-50. PMID: 12589752 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).