2G3Q:
reference: Structural basis for monoubiquitin recognition by the Ede1 UBA domain., Swanson KA, Hicke L, Radhakrishnan I, J Mol Biol. 2006 May 5;358(3):713-24. Epub 2006 Mar 9. PMID: 16563434

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