1DFO:
reference: Crystal structure at 2.4 A resolution of E. coli serine hydroxymethyltransferase in complex with glycine substrate and 5-formyl tetrahydrofolate., Scarsdale JN, Radaev S, Kazanina G, Schirch V, Wright HT, J Mol Biol 2000 Feb 11;296(1):155-68. PMID: 10656824

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