| 2KBP: reference: Structure of propeller-type parallel-stranded RNA G-quadruplexes, formed by human telomeric RNA sequences in K+ solution., Martadinata H, Phan AT, J Am Chem Soc. 2009 Feb 25;131(7):2570-8. PMID: 19183046 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).