4FZ1:
reference: Structural plasticity and dynamic selectivity of acid-sensing ion channel-spider toxin complexes., Baconguis I, Gouaux E, Nature. 2012 Sep 20;489(7416):400-5. doi: 10.1038/nature11375. Epub 2012 Jul 29. PMID: 22842900

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