4PKB:
reference: Crystal structure of patatin-17 in complex with aged and non-aged organophosphorus compounds., Wijeyesakere SJ, Richardson RJ, Stuckey JA, PLoS One. 2014 Sep 23;9(9):e108245. doi: 10.1371/journal.pone.0108245., eCollection 2014. PMID: 25248161

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