5T5N:
reference: Distinct regions that control ion selectivity and calcium-dependent activation in the bestrophin ion channel., Vaisey G, Miller AN, Long SB, Proc Natl Acad Sci U S A. 2016 Nov 22;113(47):E7399-E7408. Epub 2016 Nov 7. PMID: 27821745

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