6AU4:
reference: Crystal structure of the major quadruplex formed in the promoter region of the human c-MYC oncogene., Stump S, Mou TC, Sprang SR, Natale NR, Beall HD, PLoS One. 2018 Oct 12;13(10):e0205584. doi: 10.1371/journal.pone.0205584., eCollection 2018. PMID: 30312328

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