| 3TVB: reference: The high-resolution crystal structure of a parallel intermolecular DNA G-4 quadruplex/drug complex employing syn glycosyl linkages., Clark GR, Pytel PD, Squire CJ, Nucleic Acids Res. 2012 Feb 28. PMID: 22373921 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).