4HJI:
reference: STRUCTURE OF THE CS1 PILUS OF ENTEROTOXIGENIC ESCHERICHIA COLI REVEALS STRUCTURAL POLYMORPHISM., Galkin VE, Kolappan S, Ng D, Zong Z, Li J, Yu X, Egelman EH, Craig L, J Bacteriol. 2012 Nov 21. PMID: 23175654

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