3E6Z:
reference: Tryptophan Cu(I)-pi interaction fine-tunes the metal binding properties of the bacterial metallochaperone CusF., Loftin IR, Blackburn NJ, McEvoy MM, J Biol Inorg Chem. 2009 Apr 21. PMID: 19381697

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