5CRW:
reference: Structural basis of redox-dependent substrate binding of protein disulfide isomerase., Yagi-Utsumi M, Satoh T, Kato K, Sci Rep. 2015 Sep 9;5:13909. doi: 10.1038/srep13909. PMID: 26350503

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