1DIR:
reference: Crystal structure of a monoclinic form of dihydropteridine reductase from rat liver., Su Y, Skinner MM, Xuong NH, Matthews DA, Whiteley JM, Varughese KI, Acta Crystallogr D Biol Crystallogr. 1994 Nov 1;50(Pt 6):884-8. PMID: 15299357

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