MAO-A activity was evaluated by a two-step bioluminescent assay methodology, as previously described [32], using a MAO-GLOTM assay kit from Promega (Madison, WI, USA). The produced amount of signal (light intensity) was measured using a microplate luminometer (Multilabel Counter Victor3TM, PerkinElmer Life Sciences). Human recombinant MAO-A enzyme was used as a positive control. The results are given as relative light units after the background was subtracted.
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