1DYJ:
reference: Isomorphous crystal structures of Escherichia coli dihydrofolate reductase complexed with folate, 5-deazafolate, and 5,10-dideazatetrahydrofolate: mechanistic implications., Reyes VM, Sawaya MR, Brown KA, Kraut J, Biochemistry 1995 Feb 28;34(8):2710-23. PMID: 7873554

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