4GQN:
reference: Crystallographic and kinetic study of riboflavin synthase from Brucella abortus, a chemotherapeutic target with an enhanced intrinsic flexibility., Serer MI, Bonomi HR, Guimaraes BG, Rossi RC, Goldbaum FA, Klinke S, Acta Crystallogr D Biol Crystallogr. 2014 May;70(Pt 5):1419-34. doi:, 10.1107/S1399004714005161. Epub 2014 Apr 30. PMID: 24816110

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