2MDQ:
reference: A novel alpha4/7-conotoxin LvIA from Conus lividus that selectively blocks alpha3beta2 vs. alpha6/alpha3beta2beta3 nicotinic acetylcholine receptors., Luo S, Zhangsun D, Schroeder CI, Zhu X, Hu Y, Wu Y, Weltzin MM, Eberhard S, Kaas Q, Craik DJ, McIntosh JM, Whiteaker P, FASEB J. 2014 Jan 7. PMID: 24398291

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