1XF9:
reference: Side chain and backbone contributions of Phe508 to CFTR folding., Thibodeau PH, Brautigam CA, Machius M, Thomas PJ, Nat Struct Mol Biol 2005 Jan;12(1):10-6. Epub 2004 Dec 26. PMID: 15619636

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