Author's Organization：Department of Nutrition and Food Science Ochanomizu University Department of Nutrition and Food Science Ochanomizu University Department of Nutrition and Food Science Ochanomizu University Department of Nutrition and Food Science Ochanomizu University Department of Biology, Ochanomizu University Department of Biology, Ochanomizu University Fruit Tree Research Station
The expression and induction of polyphenol oxidase (PPO) in apple cell culture were examined. PPO activities were measured using chlorogenic acid or L-Dopa as the substrate. The isozymes of PPO were analyzed by electrophoresis and Western blotting. The isozymes expressed in cell culture were different from those in fruit and leaf. Chlorogenic acid oxidase activity in cell culture was raised 10 times by adding macerozyme, and a new isozyme of L-Dopa oxidase was induced by adding it to the culture.
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