2OGT:
reference: Crystal Structure of the Geobacillus stearothermophilus Carboxylesterase Est55 and Its Activation of Prodrug CPT-11., Liu P, Ewis HE, Tai PC, Lu CD, Weber IT, J Mol Biol. 2006 Dec 30;. PMID: 17239398

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