2F2L:
reference: Structure of tracheal cytotoxin in complex with a heterodimeric pattern-recognition receptor., Chang CI, Chelliah Y, Borek D, Mengin-Lecreulx D, Deisenhofer J, Science. 2006 Mar 24;311(5768):1761-4. PMID: 16556841

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