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Mode of binding of ionic materials to casein micelles

Published online by Cambridge University Press:  01 June 2009

Margaret L Green
Margaret L Green
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading R02 9 AT, UK
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Summary

The proportion of materials which adsorb to casein micelles and accelerate milk coagulation, and remain bound on dilution of the micelle suspension with milk dialysate was determined. This was higher than expected from the postulate that equilibration took place between the solution and many equivalent binding sites on the micelle. This suggests that binding involved either or both hydrophobic interactions and multipoint attachment to charged groups. The location of the additive binding sites in the micelle was investigated using models Na caseinate and hydroxyapatite at pH 6·6. Materials which accelerated coagulation bound to either or both models. Those with the greatest effect on milk coagulation probably bound primarily to the casein rather than to the colloidal calcium phosphate moiety of casein micelles.

Type
Original Articles
Information
Journal of Dairy Research , Volume 49 , Issue 1 , February 1982 , pp. 99 - 105
Copyright
Copyright © Proprietors of Journal of Dairy Research 1982

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References

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