5UAK:
reference: Molecular Structure of the Human CFTR Ion Channel., Liu F, Zhang Z, Csanady L, Gadsby DC, Chen J, Cell. 2017 Mar 23;169(1):85-95.e8. doi: 10.1016/j.cell.2017.02.024. PMID: 28340353

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