6B2B:
reference: Molecular determinants of permeation in a fluoride-specific ion channel., Last NB, Sun S, Pham MC, Miller C, Elife. 2017 Sep 27;6. pii: e31259. doi: 10.7554/eLife.31259. PMID: 28952925

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