1Z69:
reference: Crystal structure of methylenetetrahydromethanopterin reductase (Mer) in complex with coenzyme F420: Architecture of the F420/FMN binding site of enzymes within the nonprolyl cis-peptide containing bacterial luciferase family., Aufhammer SW, Warkentin E, Ermler U, Hagemeier CH, Thauer RK, Shima S, Protein Sci 2005 Jun 3;. PMID: 15937276

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