The intracellular distribution of adenylate kinase in the leaves of spinach,wheat and barley |
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Authors: | Kate Birkenhead David Walker Christine Foyer |
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Affiliation: | (1) ARC Research Group on Photosynthesis, University of Sheffield, S10 2TN Sheffield, UK |
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Abstract: | Of the total adenylate-kinase activity in 10-d-old barley and wheat leaves, 40–50% is localised in the chloroplasts, while in mature spinach leaves 50–70% of the enzyme is chloroplastic. The extra-chloroplastic adenylate-kinase activity is associated with the mitochondria, very little, if any, is freely soluble in the cytoplasm. The adenylate pool of the cytoplasm could have access to adenylate-kinase activity in the intermitochondrial space because of the free permeation of adenylates across the outer mitochondrial membrane. Thus the adenylate pool of the cytoplasm could be subject to adenylate-kinase equilibrium. The mitochondrial adenylate kinase appeared to the localised exclusively in the intermembrane space. |
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Keywords: | Adenylate kinase Chloroplast Hordeum (adenylate kinase) Mitochondria Spinacea Sucrose biosynthesis Triticum (adenylate kinase) |
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