6O84:
reference: Structural and functional characterization of an otopetrin family proton channel., Chen Q, Zeng W, She J, Bai X, Jiang Y, Elife. 2019 Apr 11;8. pii: 46710. doi: 10.7554/eLife.46710. PMID: 30973323

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