6QSP:
reference: An Uncommon Type II PKS Catalyzes Biosynthesis of Aryl Polyene Pigments., Grammbitter GLC, Schmalhofer M, Karimi K, Schoner TA, Tobias NJ, Morgner N, Groll M, Bode HB, J Am Chem Soc. 2019 Mar 25. doi: 10.1021/jacs.8b10776. PMID: 30908039

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