1XKP:
reference: Three-dimensional structure of a macromolecular assembly that regulates type III secretion in Yersinia pestis., Schubot FD, Jackson MW, Penrose KJ, Cherry S, Tropea JE, Plano GV, Waugh DS, J Mol Biol 2005 Mar 4;346(4):1147-61. Epub 2005 Jan 20. PMID: 15701523

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