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Towards understanding the catalytic mechanism of M.EcoP15I [EcoP15I MTase (DNA methyltransferase); an adenine methyltransferase], we investigated the role of histidine residues in catalysis. M.EcoP15I, when incubated with DEPC (diethyl pyrocarbonate), a histidine-specific reagent, shows a time- and concentration-dependent inactivation of methylation of DNA containing its recognition sequence of...
UNLABELLED Learning disorders are often magnified by auditory processing disorders (APD). OBJECTIVE This paper aims to verify whether individuals with reading and writing disorders and P300 latencies above the average also present altered Staggered Spondaic Word (SSW) and speech-in-noise test results suggestive of APD. MATERIALS AND METHODS This is a cross-sectional cohort study. Twenty-one...
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Catechol-O-methyltransferase (COMT; E.C. 2.1.1.6) is a ubiquitous enzyme in nature that plays an important role in the metabolism of catechol neurotransmitters and xenobiotics. In particular, inactivation of drugs such as L-3,4-dihydroxyphenylalanine (L-DOPA) via O-methylation is of relevant pharmacological importance, because L-DOPA is currently the most effective drug used in the treatment of...
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