2Y9M:
reference: Insights into ubiquitin-conjugating enzyme/ co-activator interactions from the structure of the Pex4p:Pex22p complex., Williams C, van den Berg M, Panjikar S, Stanley WA, Distel B, Wilmanns M, EMBO J. 2011 Nov 15. doi: 10.1038/emboj.2011.411. PMID: 22085930

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