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Rat liver NAD kinase (ATP : NAD 2'-phosphotransferase, EC 2.7.1.23)was purified about 70-fold.The Michaelis-Menten constants (Km) for NAD and ATP were 8 x 10e4 M and 2 x low3 M, respectively.NAD kinase activity was markedly inhibited by NADH and also NADPH.
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Oka et al. (1968) studied this question.
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