| 3FWK: reference: Structure and mechanism of a eukaryotic FMN adenylyltransferase., Huerta C, Borek D, Machius M, Grishin NV, Zhang H, J Mol Biol. 2009 Jun 5;389(2):388-400. Epub 2009 Apr 16. PMID: 19375431 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).