2MT9:
reference: Long-chain flavodoxin FldB from Escherichia coli., Ye Q, Fu W, Hu Y, Jin C, J Biomol NMR. 2014 Dec;60(4):283-8. doi: 10.1007/s10858-014-9874-7. Epub 2014 Nov, 8. PMID: 25380767

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