Abstract

Antioxidant peptides have attracted much attention for potential application as natural food ingredients but the fate of them, as well as oxidized proteins in foods during processing, is still poorly understood. Physicochemical changes in antioxidant peptides hydrolysated from porcine plasma protein were discussed in a free hydroxyl radical-mediated oxidation system. Porcine Plasma Protein Hydrolysates (PPH) was prepared by hydrolyzing porcine plasma protein with Alcalase for 5 h at pH 8.0, 55°C. The content of carbonyl groups increased significantly at various degrees when PPH exposed to free radical-mediated oxidation for different time and different concentrations of H2O2, while total sulfhydryls, reactive sulfhydryls and free amines contents decreased. It was concluded that PPH played an antioxidant role in the radical-mediated oxidation system. This provides a potential way for antioxidation in food production.

Keywords:

Aantioxidant peptide, free radical-mediated oxidation, physicochemical changes, porcine plasma protein,

References

Competing interests

The authors have no competing interests.

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Copyright

The authors have no competing interests.