2GJD:
reference: Distinct functional domains of Ubc9 dictate cell survival and resistance to genotoxic stress., van Waardenburg RC, Duda DM, Lancaster CS, Schulman BA, Bjornsti MA, Mol Cell Biol. 2006 Jul;26(13):4958-69. PMID: 16782883

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