5W1U:
reference: Structure of an Insecticide Sequestering Carboxylesterase from the Disease Vector Culex quinquefasciatus: What Makes an Enzyme a Good Insecticide Sponge?, Hopkins DH, Fraser NJ, Mabbitt PD, Carr PD, Oakeshott JG, Jackson CJ, Biochemistry. 2017 Oct 17;56(41):5512-5525. doi: 10.1021/acs.biochem.7b00774., Epub 2017 Sep 29. PMID: 28929747

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