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Distribution of glyoxylate-cycle enzymes between microbodies and mitochondria in Aspergillus tamarii

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The distribution of glyoxylate-cycle enzymes between microbodies and mitochondria was examined in ethanol-grown Aspergillus tamarii Kita. Particulate activities of catalase and the two glyoxylate by-pass enzymes, malate synthase and isocitrate lyase, were localized in the microbodies. The microbodies had a buoyant density of about 1.23 g cm-3 after isopycnic centrifugation in linear sucrose gradients. Particulate activities of the other two glyoxycitrate synthase, together with that of succinate dehydrogenase were restricted to the mitochondria, which had a buoyant density of about 1.20 g cm-3. Catalase also appeared to be localized in a second particle, perhaps the microbody inclusions or the Woronin bodies, having a buoyant density of about 1.26 g cm-3.

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Graves, L.B., Armentrout, V.N. & Maxwell, D.P. Distribution of glyoxylate-cycle enzymes between microbodies and mitochondria in Aspergillus tamarii . Planta 132, 143–148 (1976). https://doi.org/10.1007/BF00388895

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  • Enzyme
  • Sucrose
  • Catalase
  • Aspergillus
  • Succinate