2M27:
reference: Solution structure of the major G-quadruplex formed in the human VEGF promoter in K+: insights into loop interactions of the parallel G-quadruplexes., Agrawal P, Hatzakis E, Guo K, Carver M, Yang D, Nucleic Acids Res. 2013 Sep 4. PMID: 24005038

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