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  • a Beijing Forestry University, No.35, Qinghuadonglu, Haidian District, 100083 Beijing, China
  • | b Beijing Food Safety Analysis and Testing Engineering Research Center, No. 27, Xisanhuan Beilu, Haidian District, 100089 Beijing, China
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The inhibitory effects of phytic acid (PA) on the browning of fresh-cut chestnuts and the associated mechanisms of PA on polyphenol oxidase (PPO) and peroxidase (POD) activities were investigated. The enzymatic browning of chestnut surfaces and interiors was suppressed by soaking shelled and sliced chestnuts in a PA solution. The specific activities of PPO and POD extracted from chestnuts declined due to inhibition by PA. PA was determined to be a competitive inhibitor of both PPO and POD by Lineweaver-Burk plots. The binding modes of PA with PPO and POD were analysed by AutoDock 4.2.

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