Proteolytic activities of lysosomal enzymes in dairy cattle. II. Lysosomalenzyme activities and milk performance

Lysosomal enzyme activities and milk performance Lysosomal enzymes were gai ned from plasma and leucocytes using 1011 blood samples of 786 dairy cows. There is a correlation between enzyme activities and milk production traits with significant correlation coefficients r(p) = 0,4-0,5 for the daily mil k yield at control as well as for the lactation performance in 305 days dur ing the second third of the first lactation. The level of enzyme activities shows a higher effect on the performance than the proteolysis. No addition al gain of information is to be expected from the leucocytes what limits th e pallet to the plasma enzymes.