4GXS:
reference: The Structure of (-)-Kaitocephalin Bound to the Ligand Binding Domain of the AMPA/Glutamate Receptor, GluA2., Ahmed AH, Hamada M, Shinada T, Ohfune Y, Weerasinghe L, Garner PP, Oswald RE, J Biol Chem. 2012 Oct 17. PMID: 23076153

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