5XV2:
reference: Evolution of archaeal Rib7 and eubacterial RibG reductases in riboflavin biosynthesis: Substrate specificity and cofactor preference., Chen SC, Yen TM, Chang TH, Liaw SH, Biochem Biophys Res Commun. 2018 Sep 3;503(1):195-201. doi:, 10.1016/j.bbrc.2018.06.002. Epub 2018 Jun 8. PMID: 29864427

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