Aminooxyacetic Acid CAS NO.645-88-5

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Aminooxyacetic acid, often abbreviated AOA or AOAA, is a GABA transaminase (GABA-T) inhibitor (Ki = 9.16 µM) that inhibits 4-aminobutyrate aminotransferase (GABA-T) activity in vitro and in vivo, leading to less gamma-aminobutyric acid (GABA) being broken down. Subsequently, the level of GABA is increased in tissues. At concentrations high enough to fully inhibit 4-aminobutyrate aminotransferase activity, aminooxyacetic acid is indicated as a useful tool to study regional GABA turnover in rats. AOAA is also an inhibitor of pyridoxal phosphate (PLP)-dependent enzymes, which serve as an inhibitor by attacking the Schiff base linkage between PLP and the enzyme, forming oxime type complexes.