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Variability of gamma -glutamyltransferase in cows' milk

Variability of gamma -glutamyltransferase in cows' milk

Acta Universitatis Agriculturae Facultas Agronomica 26(2): 101-106

The mean gamma -glutamyltransferase activity of the milk of 350 Bohemian Pied cows on 5 farms is given as 36.0 mu mol (range, 16.5-72.0 mu mol). Activity tended to decrease with increase in daily milk yield, particularly when related to yield on day of measurement; among 99 cows, it was 43.6 mu mol at daily yield <2 kg, and decreased progressively to 13.2 mu mol for daily yields of 12-17 kg.

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