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    Protocols in Current Issue
    Assays of Polyphenol Oxidase Activity in Walnut Leaf Tissue
    Authors:  Ross Gertzen and Matthew A. Escobar, date: 08/20/2014, view: 12994, Q&A: 0
    [Abstract] Polyphenol oxidase (PPO) is an enzyme that catalyzes the hydroxylation of monophenols into ortho-diphenols (cresolase activity) and the oxidation of o-diphenols into quinones (catecholase activity) (Figure 1). These quinones spontaneously polymerize to form dark-colored phytomelanins, most often seen in the browning of damaged plant ...



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