4ONU:
reference: Allostery and Conformational Dynamics in cAMP-binding Acyltransferases., Podobnik M, Siddiqui N, Rebolj K, Nambi S, Merzel F, Visweswariah SS, J Biol Chem. 2014 Jun 6;289(23):16588-16600. Epub 2014 Apr 18. PMID: 24748621

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