5CE5:
reference: Probing the roles of two tryptophans surrounding the unique zinc coordination site in lipase family I.5., Timucin E, Cousido-Siah A, Mitschler A, Podjarny A, Sezerman OU, Proteins. 2015 Nov 17. doi: 10.1002/prot.24961. PMID: 26573720

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