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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Purification and physicochemical properties of NADPH-specific dihydropteridine reductase from bovine and human livers.

A new type of dihydropteridine reductase [EC], which is specific for NADPH as the substrate in the reduction of quinonoid-dihydropterin to tetrahydropterin, was purified to homogeneity from bovine liver and human liver. The molecular weight of the enzyme was determined to be 65,000-70,000. The enzyme was composed of two subunits with identical molecular weight of 35,000; the amino terminal residue was determined to be valine. The isoelectric point of the enzyme was 7.05. The physicochemical properties of this enzyme were quite different from those of bovine liver NADH-specific dihydropteridine reductase [EC]. NADPH-specific dihydropteridine reductase did not cross-react with an antiserum raised against the NADH-specific dihydropteridine reductase, nor did the latter enzyme react with an antiserum to the former enzyme, indicating that the two enzymes have no common antigenic determinants. NADPH-specific dihydropteridine reductase from human liver was shown to have properties similar to those of the bovine liver enzyme.[1]


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