3EN3:
reference: Correlating AMPA receptor activation and cleft closure across subunits: crystal structures of the GluR4 ligand-binding domain in complex with full and partial agonists., Gill A, Birdsey-Benson A, Jones BL, Henderson LP, Madden DR, Biochemistry. 2008 Dec 30;47(52):13831-41. PMID: 19102704

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