4L6T:
reference: EcxAB Is a Founding Member of a New Family of Metalloprotease AB Toxins with a Hybrid Cholera-like B Subunit., Ng NM, Littler DR, Paton AW, Le Nours J, Rossjohn J, Paton JC, Beddoe T, Structure. 2013 Oct 1. pii: S0969-2126(13)00345-6. doi:, 10.1016/j.str.2013.08.024. PMID: 24095060

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