4WZP:
reference: Ubiquitin Ser65 phosphorylation affects ubiquitin structure, chain assembly and hydrolysis., Wauer T, Swatek KN, Wagstaff JL, Gladkova C, Pruneda JN, Michel MA, Gersch M, Johnson CM, Freund SM, Komander D, EMBO J. 2014 Dec 19. pii: e201489847. PMID: 25527291

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