3IGQ:
reference: Crystal Structure of the Extracellular Domain of a Bacterial Ligand-Gated Ion Channel., Nury H, Bocquet N, Le Poupon C, Raynal B, Haouz A, Corringer PJ, Delarue M, J Mol Biol. 2009 Nov 13. PMID: 19917292

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