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MAO-A are isoenzymes present in the mitochondria membrane of neuronal and non-neuronal cells, whose main function in vivo is to catalyze the oxidative deamination of several biogenic amines, such as neurotransmitter and neuromodulatory monoamines (dopamine, norepinephrine, adrenaline, serotonin) related to movement, cognition , behavior, and which are essential to neurotransmission in the central nervous system.