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- W2587815393 abstract "In addition to well-known ceI1 wall peroxidases, there is now evidence for the presence of this enzyme at the plasma membrane of the plant cells (surface peroxidase). Both are able to catalyze, through a chain of reactions involving the superoxide anion, the oxidation of NADH to generate hydrogen peroxide. The latter is oxidized by other wall-bound peroxidases to convert cinnamoyl alcohols into radical forms, which, then polymerize to generate lignin. However, there are other enzymes at the surface of plasma membranes capable of generating hydrogen peroxide (cell wall polyamine oxidase), superoxide anion (plasma membrane Turbo reductase), or both (plasma membrane flavoprotein?). These enzymes utilize NAD(P)H as a substrate. The Turbo reductase and the flavoprotein catalyze the univalent reduction of Fe 3 ÷ and then of 02 to produce Fe 2+ and 02', respectively. The superoxide anion, in the acidic environment of the cell wall, may then dismutate to H202. These superoxide anion- and hydrogen peroxide-generating systems are discussed in relation to their possible involvement in physiological and pathological processes in the apoplast of plant cells." @default.
- W2587815393 created "2017-02-24" @default.
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- W2587815393 date "1991-01-01" @default.
- W2587815393 modified "2023-09-23" @default.
- W2587815393 title "MINI-REVIEW Generation of Superoxide Anion and Hydrogen Peroxide at the Surface of Plant Cells" @default.
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