2HNB:
reference: Solution structures and backbone dynamics of a flavodoxin MioC from Escherichia coli in both Apo- and Holo-forms: implications for cofactor binding and electron transfer., Hu Y, Li Y, Zhang X, Guo X, Xia B, Jin C, J Biol Chem. 2006 Nov 17;281(46):35454-66. Epub 2006 Sep 8. PMID: 16963438

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