2BAY:
reference: The Prp19 U-box Crystal Structure Suggests a Common Dimeric Architecture for a Class of Oligomeric E3 Ubiquitin Ligases(,)., Vander Kooi CW, Ohi MD, Rosenberg JA, Oldham ML, Newcomer ME, Gould KL, Chazin WJ, Biochemistry. 2006 Jan 10;45(1):121-130. PMID: 16388587

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