3SQ9:
reference: Ligand-binding domain of an alpha7-nicotinic receptor chimera and its complex with agonist., Li SX, Huang S, Bren N, Noridomi K, Dellisanti CD, Sine SM, Chen L, Nat Neurosci. 2011 Sep 11;14(10):1253-9. doi: 10.1038/nn.2908. PMID: 21909087

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