5WO9:
reference: Swapping of transmembrane domains in the epithelial calcium channel TRPV6., Singh AK, Saotome K, Sobolevsky AI, Sci Rep. 2017 Sep 6;7(1):10669. doi: 10.1038/s41598-017-10993-9. PMID: 28878326

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