6RQ1:
reference: Structure-Activity Relationships of cyclo(l-Tyrosyl-l-tyrosine) Derivatives Binding to Mycobacterium tuberculosis CYP121: Iodinated Analogues Promote Shift to High-Spin Adduct., Rajput S, McLean KJ, Poddar H, Selvam IR, Nagalingam G, Triccas JA, Levy CW, Munro AW, Hutton CA, J Med Chem. 2019 Nov 14;62(21):9792-9805. doi: 10.1021/acs.jmedchem.9b01199. Epub, 2019 Oct 31. PMID: 31618032

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