3HLH:
reference: Reversed enantioselectivity of diisopropyl fluorophosphatase against organophosphorus nerve agents by rational design., Melzer M, Chen JC, Heidenreich A, Gab J, Koller M, Kehe K, Blum MM, J Am Chem Soc. 2009 Dec 2;131(47):17226-32. PMID: 19894712

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