Publication Detail

Some Aspects of Fe2+-catalyzed Oxidation of Fish Sarcoplasmic Reticular Lipid

Chen-Huei Huang, Herbert Hultin, Sajida S. Jafar
7 pp.
MITSG 93-31J

The purpose of the work was to determine the role of ionic iron in lipid oxidation of isolated fish sarcoplasmic reticulum as a model for stored, ground fish muscle. Exogenous Fe3+ had only a minor role. Increasing concentrations of Fe2+ led to a greater extent of lipid oxidation, a more rapid maximal rate, but an increased lag time. It is suggested that the last occurs because Fe2+ functions as an antioxidant and reduces membrane antioxidant radicals to their active form. This conclusion is based on the observation that elimination of the antioxidative capacity of the membrane by storage or prior reaction eliminates the lag phase over a range of Fe2+ concentrations and Fe2+/Fe3+ rations. The rapid rate of Fe2+ oxidation in the presence of membrane compared to that in its absence suggests that the oxidation is driven by previously formed lipid peroxides reacting with Fe2+.

type: Technical reports

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