1S2X:
reference: Crystal structure of CagZ, a protein from the Helicobacter pylori pathogenicity island that encodes for a type IV secretion system., Cendron L, Seydel A, Angelini A, Battistutta R, Zanotti G, J Mol Biol 2004 Jul 16;340(4):881-9. PMID: 15223328

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