4RRX:
reference: Action at a Distance: Mutations of Peripheral Residues Transform Rapid Reversible Inhibitors to Slow, Tight Binders of Cyclooxygenase-2., Blobaum AL, Xu S, Rowlinson SW, Duggan KC, Banerjee S, Kudalkar SN, Birmingham WR, Ghebreselasie K, Marnett LJ, J Biol Chem. 2015 Mar 30. pii: jbc.M114.635987. PMID: 25825493

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