2VHF:
reference: The Structure of the CYLD USP Domain Explains Its Specificity for Lys63-Linked Polyubiquitin and Reveals a B Box Module., Komander D, Lord CJ, Scheel H, Swift S, Hofmann K, Ashworth A, Barford D, Mol Cell. 2008 Feb 29;29(4):451-64. PMID: 18313383

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