Hydrogen Peroxide-Dependent Oxidation of 3 ,4-Dihydroxyphenylalanine in Vacuoles of Mesophyll Cells of Vicia faba L. Participation of Peroxidase in the Oxidation
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概要
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Peroxidase activity and 3,4-dihydroxyphenylalanine (DOPA) were found in vacuoles isolated from mesophyll protoplasts of Vicia faba L. A peroxidase isozyme localized in vacuoles migrated to the cathode during electrophoresis at pH 8.7, indicating that the vacuole peroxidase was a basic isozyme. When isolated vacuoles were treated with 2 mM H_2O_2, dopachrome, a product of oxidation of DOPA, was formed in a reaction that was inhibited by KCN and NaN_3. These results suggest that DOPA can serve as a donor of electrons to the peroxidase in vacuoles.
- 日本植物生理学会の論文
著者
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Takahama Umeo
Departmcnt Of Biology Faculty Of Science Kyushu University
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Egashira Takeshi
Department of Biology, Kyushu Dental College
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Egashira Takeshi
Department Of Biology Kyushu Dental College
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