2VZ0:
reference: Development and validation of a cytochrome c coupled assay for pteridine reductase 1 and dihydrofolate reductase., Shanks EJ, Ong HB, Robinson DA, Thompson S, Sienkiewicz N, Fairlamb AH, Frearson JA, Anal Biochem. 2009 Sep 10. PMID: 19748480

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