6DPR:
reference: Mapping the Binding Trajectory of a Suicide Inhibitor in Human Indoleamine 2,3-Dioxygenase 1., Pham KN, Yeh SR, J Am Chem Soc. 2018 Oct 24. doi: 10.1021/jacs.8b07994. PMID: 30347977

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