4K5R:
reference: Molecular Insight into Substrate Recognition and Catalysis of Baeyer-Villiger Monooxygenase MtmOIV, the Key Frame-Modifying Enzyme in the Biosynthesis of Anticancer Agent Mithramycin., Bosserman MA, Downey T, Noinaj N, Buchanan SK, Rohr J, ACS Chem Biol. 2013 Sep 13. PMID: 23992662

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