2VQI:
reference: Fiber formation across the bacterial outer membrane by the chaperone/usher pathway., Remaut H, Tang C, Henderson NS, Pinkner JS, Wang T, Hultgren SJ, Thanassi DG, Waksman G, Li H, Cell. 2008 May 16;133(4):640-52. PMID: 18485872

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