2LGY:
reference: Solution structure of the E3 ligase HOIL-1 Ubl domain., Beasley SA, Safadi SS, Barber KR, Shaw GS, Protein Sci. 2012 Jul;21(7):1085-92. doi: 10.1002/pro.2080. Epub 2012 May 24. PMID: 22517668

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