2L28:
reference: NMR structures of apo L.casei dihydrofolate reductase and its complexes with trimethoprim and NADPH. Contributions to positive cooperative binding from ligand-induced refolding, conformational changes and interligand hydrophobic interactionsdagger., Feeney J, Birdsall B, Kovalevskaya NV, Smurnyy YD, Navarro-Peran EM, Polshakov VI, Biochemistry. 2011 Mar 16. PMID: 21410224

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