5K93:
reference: The Escherichia coli P and type 1 pilus assembly chaperones PapD and FimC are monomeric in solution., Sarowar S, Hu J, Werneburg GT, Thanassi DG, Li H, J Bacteriol. 2016 Jun 27. pii: JB.00366-16. PMID: 27353649

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