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Mineral-binding milk proteins and peptides; occurrence, biochemical and technological characteristics

Published online by Cambridge University Press:  09 March 2007

Gerd E. Vegarud ,
T. Langsrud  and
C. Svenning
Gerd E. Vegarud*
Affiliation:
Department of Food Science, Agricultural University of Norway, PO Box 5036, N-1432 Aas, Norway
T. Langsrud
Affiliation:
Department of Food Science, Agricultural University of Norway, PO Box 5036, N-1432 Aas, Norway
C. Svenning
Affiliation:
Department of Food Science, Agricultural University of Norway, PO Box 5036, N-1432 Aas, Norway
*
*Corresponding author: Gerd Elisabeth Vegarud, fax +47 64 943789, email [email protected]
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Abstract

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Minerals and trace elements in cow's milk occur as inorganic ions and salts or form complexes with proteins and peptides, carbohydrates, fats and small molecules. The main mineral binder or chelators of calcium are the caseins, αs1-casein, αs2-casein, β-casein and κ-casein, but also whey proteins and lactoferrin bind specific minerals like calcium, magnesium, zinc, iron, sodium and potassium. Less documented is the binding of trace elements. Peptides obtained by in vitro or in vivo hydrolysis act as mineral trappers through specific and non-specific binding sites. They may then function as carriers, chelators, of various minerals and thus enhance or inhibit bioavailability. Peptides from milk proteins have found interesting new applications in the food industry as products with improved functionality or as ingredients of dietary products, or used in pharmaceutical industry. Fortification of foods with minerals in a low concentration has for a long time been used in some countries to overcome mineral deficiency, which is an increasing problem in humans. These types of foods are being used to create a new generation of super foods in the industry today.

Keywords

MilkProteins and peptidesMineral status
Type
Research Article
Information
British Journal of Nutrition , Volume 84 , Issue S1 , November 2000 , pp. 91 - 98
Copyright
Copyright © The Nutrition Society 2000

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