4LHQ:
reference: Crystal Structures of Ricin Toxin's Enzymatic Subunit (RTA) in Complex with Neutralizing and Non-Neutralizing Single-Chain Antibodies., Rudolph MJ, Vance DJ, Cheung J, Franklin MC, Burshteyn F, Cassidy MS, Gary EN, Herrera C, Shoemaker CB, Mantis NJ, J Mol Biol. 2014 Jun 4. pii: S0022-2836(14)00276-9. doi:, 10.1016/j.jmb.2014.05.026. PMID: 24907552

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