CYTOCHROME OXIDASE IN HIGHER PLANTS
نویسندگان
چکیده
منابع مشابه
Alternative oxidase in higher plants.
Plant respiratory chain branches at the level of ubiquinone from where the electrons flow through the cytochrome pathway or to alternative oxidase. Transfer of electrons from ubiquinone to oxygen by alternative oxidase has a non-protonmotive character and, by bypassing two sites of H+ pumping in complexes III and IV, lowers the energy efficiency of respiration. In this paper we review theoretic...
متن کاملStudies on cytochrome oxidase. IV. The cytochrome oxidase activity.
where the activity is determined by measuring the rate of oxidation of reduced cytochrome c. Smith (6, 7), Conrad (8, 9), Wainio (10-13) et ~2. have extensively investigated the effect of various factors on the cytochrome oxidase activity measured by System 2 with soluble and insoluble preparations of cytochrome oxidase, whereas among those (14-30) who have employed System 1, Slater (5), using ...
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In the preceding paper the oxidation of substrates by “indophenol oxidase” was demonstrated to be a joint action of cytochrome and cytochrome oxidase. It was further shown that with a given amount of oxidase the velocity of hydroquinone oxidation reached a maximum as the amount of added cytochrome was increased. The latter fact immediately suggested the probability that the rapid aerobic oxidat...
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Cytochrome oxidase from beef heart mitochondria is a 2O4 kDa large protein consisting of 13 subunits of which the numbers 1-111 are encoded by the mitochoridrial DNA, while the remaining subunits (IV-VIII) are encoded by the nuclear genome. The protein contains 2 iron heme groups (cytochrome a and cytochrome a3), 2 Cu centres (CUA and CUB) and 1 Zn atom. The heme groups and the CuB centre are l...
متن کاملReactions of cytochrome oxidase.
In 1939 Keilin and Hartree (2) advanced the concept that there are two cytochrome components reacting between cytochrome c and oxygen; namely, cytochrome a and cytochrome a3. They based their hypothesis principally on the action of carbon monoxide which caused the a-band of reduced cytochrome a to spread toward 590 rnp and the r-band at 448 rnp to shift to 430 rnp and to be replaced by a very p...
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ژورنال
عنوان ژورنال: New Phytologist
سال: 1951
ISSN: 0028-646X,1469-8137
DOI: 10.1111/j.1469-8137.1951.tb05173.x