1JCH:
reference: Crystal structure of colicin E3: implications for cell entry and ribosome inactivation., Soelaiman S, Jakes K, Wu N, Li C, Shoham M, Mol Cell 2001 Nov;8(5):1053-62. PMID: 11741540

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