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- W2040980247 abstract "—(1) The effects of aminooxyacetic acid, ouabain and Ca2+ on the compartmentation of amino acid metabolism have been studied in slices of brain incubated with sodium-[1-14C]acetate, l-[U-14C]glutamate and l-[U-14C]aspartate as tracer metabolites. (2) Aminooxyacetic acid (10-3 m) inhibited the labelling of aspartate from [14C]acetate and [14C]glutamate, as well as the incorporation of label from [14C]aspartate into glutamate and glutamine. It also inhibited the labelling of GABA from all three radioactive precursors, as would be anticipated if there was inhibition of several transaminases as well as glutamate decarboxylase. The RSA of glutamine labelled from [1-14C]acetate was increased. This finding indicated that the glutamate pool which is utilized for glutamine formation is associated with glutamate dehydrogenase, and this enzyme appears to be related to the ‘synthetic tricarboxylic acid cycle’. AOAA exerted its major inhibitory effects on the citric acid‘energy cycle’with which transaminases are associated. (3) Ouabain (10-5 m) inhibited the labelling of glutamine to a much greater extent than the labelling of glutamate from [1-14C]acetate. It also caused leakage of amino acids from the tissue into the medium. Its effect on the glutamate–glutamine system was interpreted to be a selective inhibition of the 'synthetic’citric acid cycle. (4) The omission of Ca2+ from the incubation medium was associated with formation of glutamine with RSA less than 1·0 when labelled from [U-14C]glutamate, [U-14C]aspartate and lower than normal when labelled from [1-14C]acetate." @default.
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- W2040980247 date "1970-07-01" @default.
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- W2040980247 title "COMPARTMENTATION OF CITRIC ACID CYCLE METABOLISM IN BRAIN: EFFECT OF AMINOOXYACETIC ACID, OUABAIN AND Ca<sup>2+</sup>ON THE LABELLING OF GLUTAMATE, GLUTAMINE, ASPARTATE AND GABA BY [1-<sup>14</sup>C]ACETATE, [U-<sup>14</sup>C]GLUTAMATE AND [U-<sup>14</sup>C] ASPARTATE" @default.
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- W2040980247 doi "https://doi.org/10.1111/j.1471-4159.1970.tb02253.x" @default.
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