5YIL:
reference: Hoisting-Loop in Bacterial Multidrug Exporter AcrB Is a Highly Flexible Hinge That Enables the Large Motion of the Subdomains., Zwama M, Hayashi K, Sakurai K, Nakashima R, Kitagawa K, Nishino K, Yamaguchi A, Front Microbiol. 2017 Oct 25;8:2095. doi: 10.3389/fmicb.2017.02095. eCollection, 2017. PMID: 29118749

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