2GBR:
reference: Structures of Ubiquitin Insertion Mutants Support Site-specific Reflex Response to Insertions Hypothesis., Ferraro DM, Ferraro DJ, Ramaswamy S, Robertson AD, J Mol Biol. 2006 Jun 2;359(2):390-402. Epub 2006 Apr 5. PMID: 16647719

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