| 5FKG: reference: A critical base pair in k-turns determines the conformational class adopted, and correlates with biological function., Huang L, Wang J, Lilley DM, Nucleic Acids Res. 2016 Mar 25. pii: gkw201. PMID: 27016741 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).