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The interaction between lipid oxidation products and bovine sarcoplasmic (SP) and myofibrillar protein (MP) homogenates in the presence of green tea was investigated. To monitor the effect of green tea on lipid oxidation, aldehydes were measured while effect on protein was monitored via changes in myoglobin, thiols, and tryptophan fluorescence over nine days of refrigerated storage. The presence of SP and MP decreased free aldehydes in the buffers. The SP bound more aldehydes than MP. The tea compounds exhibited more favorable binding energies than aldehydes near histidine 64 close to the heme moiety of myoglobin. Addition of tea lowered tryptophan fluorescence and thiol content. The results suggested that green tea enhances the binding of bovine SP and MP to lipid oxidation products. The results also suggested that green tea can decrease rancidity by directly binding lipid oxidation products.


NOTICE: this is the author’s version of a work that was accepted for publication in Food Research International. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Food Research International, volume 89, issue 2 (CoCoTea 2015 – Third International Congress on Cocoa, Coffee and Tea), in 2016. DOI: 10.1016/j.foodres.2016.01.016

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