2RLU:
reference: The three-dimensional structure of the Moorella thermoacetica selenocysteine insertion sequence RNA hairpin and its interaction with the elongation factor SelB., Beribisky AV, Tavares TJ, Amborski AN, Motamed M, Johnson AE, Mark TL, Johnson PE, RNA. 2007 Nov;13(11):1948-56. Epub 2007 Sep 27. PMID: 17901155

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