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Department of Physiology, The University of Western Australia, Nedlands, Western Australia 6009
ABSTRACT
Following centrifugation at 4 C, about one-fourth of the iron of whole rat milk separates with the whey and more than two-thirds sediments with casein. When mixtures of radioactive iron-59 labelled whey and unlabelled whole milk were incubated together and subsequently fractionated by centrifugation, nearly all of the label was recovered in the whey fraction. These results indicate that iron associated with casein is not derived from a soluble whey protein.
1 Present address: Department of Physiology, Medical Faculty, University of Malaya, Kuala Lumpur, Malaysia
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