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Milk-fat globule membranes: chemical composition and phosphoesterase activities during lactation

Published online by Cambridge University Press:  01 June 2009

Teresa Diaz-Mauriño  and
M. Nieto
Teresa Diaz-Mauriño
Affiliation:
Institute de Productos Lácteos, Arganda del Rey, Madrid, Spain
M. Nieto
Affiliation:
Sectión de Bioquímica de Membranas, Velázquez, 144, Madrid-6, Spain
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Summary

The morphology, protein and glycoprotein composition, amino-acid analysis, phospholipid and carbohydrate contents and 3 phosphoesterase activities of the milk-fat globule membranes were studied in 4 cows during their whole period of lactation. No differences were found in the morphology and the overall chemical composition. However, glycoprotein composition varied with the cow and, for each cow, with the stage of lactation. The differences were more marked for membranes obtained from colostrum. Acid phosphomonoesterase was practically unchanged during the whole period of lactation, while alkaline phosphomonoesterase and phosphodiesterase increased as lactation proceeded.

Type
Original Articles
Information
Journal of Dairy Research , Volume 44 , Issue 3 , October 1977 , pp. 483 - 493
Copyright
Copyright © Proprietors of Journal of Dairy Research 1977

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