5LHM:
reference: Functional and structural characterisation of a bacterial O-methyltransferase and factors determining regioselectivity., Siegrist J, Netzer J, Mordhorst S, Karst L, Gerhardt S, Einsle O, Richter M, Andexer JN, FEBS Lett. 2017 Jan;591(2):312-321. doi: 10.1002/1873-3468.12530. Epub 2017 Jan, 8. PMID: 27990630

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