DISTRIBUTION OF GLUTATHIONE PEROXIDASE-ACTIVITY AND SELENIUM IN THE BLOOD OF DAIRY-COWS

  • 1 January 1979
    • journal article
    • research article
    • Vol. 40  (2) , 245-249
Abstract
The distribution of glutathione peroxidase (GSH-Px EC 1.11.1.9) activity and Se concentrations among several components in the blood of dairy cows was examined. Approximately 98% of the GSH-Px activity in peripheral blood was associated with the erythrocytes when enzyme activity was expressed as units/ml of blood. The GSH-Px activity expressed/cell was approximately 4-fold greater for peripheral leukocytes than for erythrocytes. The cellular component contained a greater proportion (approximately 73%) of whole blood Se than did the plasma. A positive linear relationship (r [coefficient of correlation] = 0.958) between blood GSH-Px activity and blood Se concentrations was found in dairy cattle under practical field conditions.