3IAX:
reference: The crystal structure of the TolB box of colicin A in complex with TolB reveals important differences in the recruitment of the common TolB translocation portal used by group A colicins., Zhang Y, Li C, Vankemmelbeke MN, Bardelang P, Paoli M, Penfold CN, James R, Mol Microbiol. 2009 Jul 21. PMID: 19627502

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