1NOT:
reference: Three-dimensional structure of the alpha-conotoxin GI at 1.2 A resolution., Guddat LW, Martin JA, Shan L, Edmundson AB, Gray WR, Biochemistry 1996 Sep 3;35(35):11329-35. PMID: 8784187

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