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This study focused on the effect of pH on the activity, thermokinetics and inhibition of polyphenol oxidase (PPO) from honeydew peach pulp with (+)-catechin as the substrate. The optimum pH for the PPO activity was around 6.5–7.0, and the optimum temperature was pH dependent and it was 40 °C at pH 6.8 while 30 °C at pH 4.0. The enzyme was stable in the pH range of 6.0–8.0 during the storage at 4 °C...
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