3NGL:
reference: Crystal structure of bifunctional 5,10-methylenetetrahydrofolate dehydrogenase/cyclohydrolase from Thermoplasma acidophilum., Lee WH, Sung MW, Kim JH, Kim YK, Han A, Hwang KY, Biochem Biophys Res Commun. 2011 Mar 18;406(3):459-63. Epub 2011 Feb 17. PMID: 21333632

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