1OTR:
reference: Solution structure of a CUE-ubiquitin complex reveals a conserved mode of ubiquitin binding., Kang RS, Daniels CM, Francis SA, Shih SC, Salerno WJ, Hicke L, Radhakrishnan I, Cell 2003 May 30;113(5):621-30. PMID: 12787503

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