2BC7:
reference: alpha -selenoconotoxins: A new class of potent alpha 7 neuronal nicotinic receptor antagonists., Armishaw CJ, Daly NL, Nevin ST, Adams DJ, Craik DJ, Alewood PF, J Biol Chem. 2006 Feb 24;. PMID: 16500898

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