1AO8:
reference: The solution structure of the complex of Lactobacillus casei dihydrofolate reductase with methotrexate., Gargaro AR, Soteriou A, Frenkiel TA, Bauer CJ, Birdsall B, Polshakov VI, Barsukov IL, Roberts GC, Feeney J, J Mol Biol 1998 Mar 20;277(1):119-34. PMID: 9514736

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