1RB3: Dihydrofolate Reductase Complexed With Methotrexate And Nico Adenine Dinucleotide Phosphate (Oxidized Form)
reference: Loop and subdomain movements in the mechanism of Escherichia coli dihydrofolate reductase: crystallographic evidence., Sawaya MR, Kraut J, Biochemistry 1997 Jan 21;36(3):586-603. PMID: 9012674

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