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Biochemistry and Molecular Biology of Antioxidants in the Rhizobia-Legume Symbiosis
Author(s) -
Manuel A. Matamoros,
David A. Dalton,
Javier Ramos,
Maria R. Clemente,
María C. Rubio,
Manuel Becana
Publication year - 2003
Publication title -
plant physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.554
H-Index - 312
eISSN - 1532-2548
pISSN - 0032-0889
DOI - 10.1104/pp.103.025619
Subject(s) - biochemistry , hydrogen peroxide , cellular respiration , alternative oxidase , superoxide , biology , radical , molecular oxygen , chemistry , oxygen , bacteria , symbiosis , mitochondrion , enzyme , catalysis , organic chemistry , genetics
The complete reduction of molecular oxygen to water requires four electrons and is catalyzed by cytochrome oxidase in aerobic bacteria and mitochondria. However, 1% to 3% of all oxygen consumed by respiration is inevitably reduced to superoxide radicals and hydrogen peroxide (H2O2). These and other

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