The activity of glutamate decarboxylase (L-glutamate carboxy-1-lyase; EC 4.1.1.15), GABA-transaminase (GABA-alpha-ketoglutarate aminotransferase, EC 2.6.1.19), content of gamma-aminobutyric, glutamic and aspartic acids were studied in different parts and subcellular particles of the cat and rat brain. It is shown that regional and subcellular distribution of the GABA metabolic components in the cat and rat brain are mainly similar, but quantitative indices are different.
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