Abstract
Oxidation of norepinephrine catalyzed by Cu2+ was variously regulated with nucleic acid components. The reaction proceeded by a mechanism of sequential random ordered reaction via formation of the mixed complex of nucleic acid component, Cu2+ and aromatic reductone. Using norepinephrine as an aromatic reductone, the promoting activities of nucleic acid components on the oxidation of norepinephrine were compared and the effect of these components to the specific stage of the oxidation process was kinetically investigated. The results indicated that velocity of the oxidation was most remarkably stimulated in the presence of adenine. The velocity was followed by guanine, guanosine monophosphate, cytosine, cytidine, NAD+, adenosine, cytidine monophosphate, uridine monophosphate, then adenosine monophosphate in that order. It was also discussed that adenine was the most plausible nucleic acid component which could participate in the in vivo oxidation of norepinephrine, taking into account the concentration of ...
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