3ZLZ:
reference: Assembly, analysis and architecture of atypical ubiquitin chains., Hospenthal MK, Freund SM, Komander D, Nat Struct Mol Biol. 2013 Apr 7. doi: 10.1038/nsmb.2547. PMID: 23563141

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