2Y6E:
reference: The DUSP-Ubl domain of USP4 enhances its catalytic efficiency by promoting ubiquitin exchange., Clerici M, Luna-Vargas MP, Faesen AC, Sixma TK, Nat Commun. 2014 Nov 18;5:5399. doi: 10.1038/ncomms6399. PMID: 25404403

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