1P9H:
reference: The Yersinia adhesin YadA collagen-binding domain structure is a novel left-handed parallel beta-roll., Nummelin H, Merckel MC, Leo JC, Lankinen H, Skurnik M, Goldman A, EMBO J 2004 Feb 25;23(4):701-11. Epub 2004 Feb 5. PMID: 14765110

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