2LX1:
reference: Novel conformation of an RNA structural switch., Kennedy SD, Kierzek R, Turner DH, Biochemistry. 2012 Nov 20;51(46):9257-9. doi: 10.1021/bi301372t. Epub 2012 Nov, 12. PMID: 23134175

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