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Assays of Polyphenol Oxidase Activity in Walnut Leaf Tissue
Authors:
Ross Gertzen
and
Matthew A. Escobar
,
date:
08/20/2014,
view:
19829,
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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