4C7R:
reference: Structural evidence for functional lipid interactions in the betaine transporter BetP., Koshy C, Schweikhard ES, Gartner RM, Perez C, Yildiz O, Ziegler C, EMBO J. 2013 Oct 18. doi: 10.1038/emboj.2013.226. PMID: 24141878

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