3QDR:
reference: Structural evidence that colicin A binds to a novel binding site of TolA in the E.coli periplasm., Li C, Zhang Y, Vankemmelbeke M, Hecht O, Aleanizy FS, Macdonald C, Moore GR, James R, Penfold CN, J Biol Chem. 2012 Apr 9. PMID: 22493500

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