4WXJ:
reference: Functional reconstitution of Drosophila melanogaster NMJ glutamate receptors., Han TH, Dharkar P, Mayer ML, Serpe M, Proc Natl Acad Sci U S A. 2015 Apr 27. pii: 201500458. PMID: 25918369

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