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High-performance liquid chromatographic determination of histamine N-methyltransferase activity
H Fukuda1, A Yamatodani, I Imamura
1Department of Pharmacology II, Osaka University, Faculty of Medicine, Japan.
Journal of Chromatography
|July 5, 1991
Abstract:
A method for the determination of histamine N-methyltransferase (HMT) activity by high-performance liquid chromatography based on post-column derivatization with omicron-phthalaldehyde is described. The determination involves the separation of the substrate, histamine, from its product. N tau-methylhistamine, using a weak cation exchanger, followed by on-line derivatization of these imidazoleamines with omicron-phthalaldehyde and their detection and quantitation with a fluorimetric detector. This assay method is suitable for the measurement of HMT activity during enzyme purification.