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Journal of Dairy Science Vol. 56 No. 6 724-728
© 1973 by American Dairy Science Association ®
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Changes in the Milk Protein Separation Pattern of Israeli-Friesian Cows as Related to Period of Lactation and Feeding1

S. Gordin, Y. Birk and R. Volcani

Agricultural Research Organization, The Volcani Center, Bet Dagan and Faculty of Agriculture, Hebrew University of Jerusalem, Rehovot, Israel

ABSTRACT

Protein separation patterns of milk produced by cows fed normal or high energy diets during lactation were studied. Fractionation methods were column chromatography on DEAE-cellulose, paper electrophoresis in collidine acetate buffer at pH 6.8, and polyacrylamide gel electrophoresis at pH 8.3. Each cow has a characteristic milk protein pattern which changes during lactation. Feeding produced no discermible differences in milk protein pattern.

FOOTNOTES

1 Contribution from The Volcani Center, Agricultural Research Organization, Bet Dagan, Israel. 1972 Series 2068-E.






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Copyright © 1973 by the American Dairy Science Association ®.