Effect of phthalonic acid on respiration and metabolite transport in higher plant mitochondria |
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Authors: | David A Day Joseph T Wiskich |
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Institution: | Botany Department, University of Adelaide, Adelaide, South Australia 5001, Australia |
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Abstract: | Phthalonate was found to inhibit the following parameters in higher plant mitochondria; glutamate and isocitrate oxidation, swelling in ammonium citrate and glutamate (but not malate), citrate-isocitrate exchange, oxalacetate entry and efflux, and NAD-linked malic enzyme. Phthalonate had little effect on malate, NADH, or oxoglutarate oxidation, nor on malate, isocitrate, or glutamate dehydrogenases. The results indicate that phthalonate is an inhibitor of oxalacetate, glutamate, and citrate transport in plant mitochondria, but not of oxoglutarate or dicarboxylate transport. |
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