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Occurrence of milk proteins in the urine of cows during an extended milking interval

Published online by Cambridge University Press:  01 June 2009

R. L. J. Lyster  and
J. V. Wheelock
R. L. J. Lyster
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading
J. V. Wheelock
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading
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Summary

Immunological methods have been used to test samples of urine from 5 cows for the presence of milk proteins. None could be detected when the cows were milked twice daily at the usual intervals, but during an extended milking interval α-lactalbumin was found in the urine of all 5 cows and β-lactoglobulin in the urine of 2 cows. The urine of one cow during and after a milking interval of 39 h contained 1·63 g α-lactalbumin, 1·12 g β-lactoglobulin and a small amount of casein. One of the factors affecting the transfer of these milk constituents from the udder to the urine appears to be their molecular weight.

Type
Original Articles
Information
Journal of Dairy Research , Volume 34 , Issue 1 , February 1967 , pp. 27 - 30
Copyright
Copyright © Proprietors of Journal of Dairy Research 1967

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References

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