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Teneur en caséine κ de la caséine de colostrum de vache

Published online by Cambridge University Press:  01 June 2009

B. Ribadeau-Dumas  and
Monique Veaux
B. Ribadeau-Dumas
Affiliation:
Station Centrale de Microbiologie et Recherches Laitières, I.N.R.A., Jouy-en-josas (Seine-et-Oise), France
Monique Veaux
Affiliation:
Station Centrale de Microbiologie et Recherches Laitières, I.N.R.A., Jouy-en-josas (Seine-et-Oise), France
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Summary

Casein derived from cow's colostrum contains 0·85% N-acetyl neuraminic acid and liberates 2·95% nitrogen soluble in 12% trichloroacetic acid (NPN) under the action of rennin. It therefore appears to contain a large proportion of κ-casein (calculated to be approximately 35%).

The smaller the micelles of casein in colostrum the larger is the amount of N-acetyl neuraminic acid they contain. Soluble casein, i.e. 25% of the casein in colostrum, contains 1·52% of this acid and gives 6·24% NPN under the action of rennin.

Casein and particularly the soluble casein of colostrum appear to be important sources of κ-casein and caseino-glycopeptide.

Type
Original Articles
Information
Journal of Dairy Research , Volume 31 , Issue 2 , June 1964 , pp. 189 - 193
Copyright
Copyright © Proprietors of Journal of Dairy Research 1964

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References

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