4F4C:
reference: Crystal structure of the multidrug transporter P-glycoprotein from Caenorhabditis elegans., Jin MS, Oldham ML, Zhang Q, Chen J, Nature. 2012 Oct 25;490(7421):566-9. doi: 10.1038/nature11448. Epub 2012 Sep 23. PMID: 23000902

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