| 2LDT: reference: Solution structure of an alternate conformation of helix27 from Escherichia coli16S rRNA., Spano MN, Walter NG, Biopolymers. 2011 Oct;95(10):653-68. doi: 10.1002/bip.21626. Epub 2011 Mar, 25. PMID: 21442607 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).