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Effect of monovalent cations on glutamate metabolism in the rat brain



Effect of monovalent cations on glutamate metabolism in the rat brain



Biokhimiya 41(10): 1778-1783



Glutamate oxidation in vitro via deamination and transamination during gramicidin C-induced transport of K+ and Na+ in rat nervous tissue mitochondria was studied. An increase in NH4+ production, i.e., in glutamate oxidation due to deamination, occurred with maximal increase of O2 consumption in the presence of cations. Na+ (1.5 mM) activated O2 consumption by 15% and accelerated NH4+ production from glutamate (by 17%). No changes in aspartate production were observed. K+ (15 mM) increased O2 consumption by 29% and NH4+ production by 11% during a decrease in aspartate production as compared to glutamate oxidation in the presence of a lower (10 mM) concentration of K+ in the samples.

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Accession: 005254997

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