Distribution of glutathione peroxidase activity and selenium in the blood of dairy cows
Scholz, R.W.; Hutchinson, L.J.
American Journal of Veterinary Research 40(2): 245-249
1979
ISSN/ISBN: 0002-9645 PMID: 464361 Document Number: 149386
The distribution of glutathione peroxidase (GSH-Px) activity and selenium concentrations among several components in the blood of 146 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 per millilitre of blood. The GSH-Px activity expressed per cell was approximately fourfold greater for peripheral leukocytes than for erythrocytes. The cellular component contained a greater proportion (approx. 73%) of whole blood selenium than did the plasma. A positive linear relationship between blood GSH-Px activity and blood selenium concentrations was found in dairy cattle.