1A3S: Human Ubc9
reference: Structure of ubiquitin-conjugating enzyme 9 displays significant differences with other ubiquitin-conjugating enzymes which may reflect its specificity for sumo rather than ubiquitin., Giraud MF, Desterro JM, Naismith JH, Acta Crystallogr D Biol Crystallogr. 1998 Sep 1;54(Pt 5):891-8. PMID: 9757105

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