Abstract

A neuroregulatory factor (neurocatin) has been isolated from bovine brain. Neurocatin is a powerful affector of catecholamine metabolism in synaptosomes isolated from rat brain, causing increased formation of norepinephrine (NE) and decreased formation of 3,4-dihydroxyphenylacetic acid (DOPAC). The ratio NE/DOPAC in synaptosomes has been used to measure the neurocatin content of samples during isolation. Neurocatin has now been purified to a single chromatographic peak by high-resolution HPLC and a preliminary amino acid content measured. It appears to be a small peptide with a molecular weight in the range of 2,000–2,500 Da.

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