4ZUX:
reference: Structural basis for histone H2B deubiquitination by the SAGA DUB module., Morgan MT, Haj-Yahya M, Ringel AE, Bandi P, Brik A, Wolberger C, Science. 2016 Feb 12;351(6274):725-8. doi: 10.1126/science.aac5681. PMID: 26912860

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