5AIU:
reference: Structural basis for the RING-catalyzed synthesis of K63-linked ubiquitin chains., Branigan E, Plechanovova A, Jaffray EG, Naismith JH, Hay RT, Nat Struct Mol Biol. 2015 Jul 6. doi: 10.1038/nsmb.3052. PMID: 26148049

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