5I2V:
reference: High-resolution 3D NMR structure of the KRAS proto-oncogene promoter reveals key features of a G-quadruplex involved in transcriptional regulation., Kerkour A, Marquevielle J, Ivashchenko S, Yatsunyk LA, Mergny JL, Salgado GF, J Biol Chem. 2017 Mar 22. pii: jbc.M117.781906. doi: 10.1074/jbc.M117.781906. PMID: 28330874

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