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  • Title: Distribution of activity converting 4-aminobutyraldehyde to gamma-aminobutyric acid in subcellular fractions of mouse brain.
    Author: Asakura T, Ikeda Y, Matsuda M.
    Journal: J Neurochem; 1989 Feb; 52(2):448-52. PubMed ID: 2911024.
    Abstract:
    The subcellular distribution of activity of 4-aminobutyraldehyde dehydrogenase (ABAL-DH) was studied in mouse brain. ABAL-DH was localized mainly in the crude mitochondrial fraction; most of the activity in this fraction was found in the subfraction containing synaptosomes, and the remainder was in the mitochondrial fraction. After osmotic disruption of synaptosomes, most of the activity was located in the synaptic cytosol, and the remainder was in the synaptic mitochondria. Sucrose density subfractionation of synaptosomes revealed that gamma-aminobutyric acid, glutamic acid decarboxylase, and ABAL-DH localized in a denser region of gradient fraction than the region containing acetylcholinesterase and choline acetyltransferase.
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