2XQH:
reference: The Structure of E. coli IgG-Binding Protein D Suggests a General Model for Bending and Binding in Trimeric Autotransporter Adhesins., Leo JC, Lyskowski A, Hattula K, Hartmann MD, Schwarz H, Butcher SJ, Linke D, Lupas AN, Goldman A, Structure. 2011 Jul 13;19(7):1021-30. PMID: 21742268

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