M L Ceccuzzi

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In order to value the availability of niacin in man, it has been more suitable to test erythrocyte nicotinate-phosphoribosyltransferase and nicotinamide-phosphoribosyltransferase activities. These enzymes catalyze the production of Des-NMN and NMN from free bases. The radioactive compounds, produced from [14C] NAc and [14C] NAm, are isolated by a gel(More)
Rat thymus and thymocytes possess an NAD-glycohydrolase activity lower than spleen and spleen lymphocytes. In all cases, the highest activity (50%) is bound to the nuclei, while that in the soluble fraction is higher (in percent) in the lymphocytes than in the whole organ. Considering that thymus and thymocytes are characterized by a soluble NAD-ase(More)
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