5LWA:
reference: A mobile loop near the active site acts as a switch between the dual activities of a viral protease/deubiquitinase., Jupin I, Ayach M, Jomat L, Fieulaine S, Bressanelli S, PLoS Pathog. 2017 Nov 8;13(11):e1006714. doi: 10.1371/journal.ppat.1006714., eCollection 2017 Nov. PMID: 29117247

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