5IUX:
reference: Identification of a pre-active conformation of a pentameric channel receptor., Menny A, Lefebvre SN, Schmidpeter PA, Drege E, Fourati Z, Delarue M, Edelstein SJ, Nimigean CM, Joseph D, Corringer PJ, Elife. 2017 Mar 15;6. doi: 10.7554/eLife.23955. PMID: 28294942

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