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J Biol Chem. 1979 Nov 25;254(22):11475-84.

Porcine liver dihydrofolate reductase. Purification, properties, and amino acid sequence.

Abstract

Porcine liver dihydrofolate reductase has been purified 18,000-fold to homogeneity. The properties of the purified enzyme were compared to those of dihydrofolate reductase from L1210 cells, the only mammalian reductase for which complete amino acid sequence data are available. The enzymes are very similar when compared on the basis of mechanism and kinetic constants, molecular weights, isoelectric points, and stimulation by salt. A comparison of the amino acid sequences of both enzymes shows an overall identity of 89%. Thus, the similarities seen in inhibitor-binding profiles of mammalian enzymes reflect the close relationship of these enzymes at the molecular level.

PMID:
500653
[PubMed - indexed for MEDLINE]
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