3IA2:
reference: Different active-site loop orientation in serine hydrolases versus acyltransferases., Jiang Y, Morley KL, Schrag JD, Kazlauskas RJ, Chembiochem. 2011 Mar 21;12(5):768-76. doi: 10.1002/cbic.201000693. Epub, 2011 Feb 23. PMID: 21351219

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