5LAI:
reference: Tunable Probes with Direct Fluorescence Signals for the Constitutive and Immunoproteasome., Dubiella C, Cui H, Groll M, Angew Chem Int Ed Engl. 2016 Oct 10;55(42):13330-13334. doi:, 10.1002/anie.201605753. PMID: 27709817

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