3QOU:
reference: Escherichia coli Thioredoxin-like Protein YbbN Contains an Atypical Tetratricopeptide Repeat Motif and Is a Negative Regulator of GroEL., Lin J, Wilson MA, J Biol Chem. 2011 Jun 3;286(22):19459-69. Epub 2011 Apr 15. PMID: 21498507

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