1FAS:
reference: 1.9-A resolution structure of fasciculin 1, an anti-acetylcholinesterase toxin from green mamba snake venom., le Du MH, Marchot P, Bougis PE, Fontecilla-Camps JC, J Biol Chem 1992 Nov 5;267(31):22122-30. PMID: 1429564

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