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  • Title: Comparison of pyrimidine 5'nucleotidase activity in erythrocytes of sheep, dogs, cats, horses, calves, and Mongolian gerbils.
    Author: George JW, Duncan JR, Mahaffey EA.
    Journal: Am J Vet Res; 1983 Oct; 44(10):1968-70. PubMed ID: 6314858.
    Abstract:
    Pyrimidine 5'nucleotidase (P5N) activities of erythrocytes for Mongolian gerbils, cats, dogs, sheep, horses, and calves were measured, using a radiometric technique with [14C]cytidine monophosphate as the substrate. Erythrocytes of gerbils had the highest activity [1,177.1 +/- 133.6 mU/g of hemoglobin (Hb)]. Feline erythrocytes had 327.4 +/- 204.4 mU/g of Hb. Canine erythrocytes had 148.0 +/- 19.8 mU/g of Hb. Ovine erythrocytes (44.3 +/- 20.9 mU/g of Hb), equine erythrocytes (30.0 +/- 15.9 mU/g of Hb), and bovine erythrocytes (14.1 +/- 6.9) had relatively low P5N activity. The P5N activity was approximately proportional to the reticulocyte percentage of and inversely proportional to the mean erythrocyte life span in these species.
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