||Monoamine oxidases (MAO, EC 18.104.22.168) are a family of enzymes that can oxidize a wide variety of endogenous primary amines. Two isoforms, MAO-A and MAO-B, have been identified based on their substrate, inhibitor specificity, and tissue localization. MAO-B can oxidize primary amines, but its list of specific substrates (i.e. benzylamine, phenylethylamine) is more limited compared to MAO-A. MAO-B is a mitochondrial-bound enzyme that is ubiquitously expressed throughout the brain and other tissues. It has been investigated in numerous studies including Parkinson’s disease, Alzheimer’s, and tobacco addiction. Specific MAO-B inhibitors such as selegiline, & rasagiline have been used to treat Parkinson’s patients, but their benefits are considered rather modest. MAO-B Inhibitor Screening Kit offers a rapid, simple, sensitive, and reliable test suitable for high-throughput screening of MAO-B inhibitors. The assay is based on the fluorometric detection of H2O2, one of the byproducts generated during the oxidative deamination of MAO substrate.