3I3L:
reference: Chloramphenicol Biosynthesis: The Structure of CmlS, a Flavin-Dependent Halogenase Showing a Covalent Flavin-Aspartate Bond., Podzelinska K, Latimer R, Bhattacharya A, Vining LC, Zechel DL, Jia Z, J Mol Biol. 2010 Mar 19;397(1):316-331. Epub 2010 Jan 18. PMID: 20080101

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