4OKM:
reference: Induced-Fit Mechanism in Class I Terpene Cyclases., Baer P, Rabe P, Fischer K, Citron CA, Klapschinski TA, Groll M, Dickschat JS, Angew Chem Int Ed Engl. 2014 May 30. doi: 10.1002/anie.201403648. PMID: 24890698

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