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The reaction of αs1- and β-casein with ferrous ions in the presence of oxygen

Published online by Cambridge University Press:  01 June 2009

W. Manson  and
J. Cannon
W. Manson
Affiliation:
The Hannah Research Institute, Ayr, Scotland, KA6 5HL
J. Cannon
Affiliation:
The Hannah Research Institute, Ayr, Scotland, KA6 5HL
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Summary

The reaction of αs1- and β-casein with ferrous ions and O2 has been studied. It has been found that phosphoseryl residues present in these proteins rapidly catalyse the oxidation of iron from the ferrous to the ferric state with the formation of stable ferric-phosphoprotein complexes and the consumption of the theoretical amount of O2. When, however, the phosphoseryl residues occurred in groups, the formation of ferric complexes was accompanied by uptakes of O2 in quantities significantly in excess of that required for the oxidation of ferrous to ferric iron.

The significance of these findings is discussed in relation to hypotheses which have been advanced concerning the possible biological function of phosphoprotein.

Type
Original Articles
Information
Journal of Dairy Research , Volume 45 , Issue 1 , February 1978 , pp. 59 - 67
Copyright
Copyright © Proprietors of Journal of Dairy Research 1978

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References

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