5HH3:
reference: Structure of OxyA : completing our picture of the glycopeptide antibiotic producing Cytochrome P450 cascade., Haslinger K, Cryle MJ, FEBS Lett. 2016 Jan 28. doi: 10.1002/1873-3468.12081. PMID: 26820384

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