4Q84:
reference: Discovery of a new ATP-binding motif involved in peptidic azoline biosynthesis., Dunbar KL, Chekan JR, Cox CL, Burkhart BJ, Nair SK, Mitchell DA, Nat Chem Biol. 2014 Aug 17. doi: 10.1038/nchembio.1608. PMID: 25129028

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