NAD + kinase (NADK, EC 2.7.1.23) catalyzes the phosphorylation from nicotinamide adenine dinucleotide (NAD +) to NADP +, using ATP as the phosphate group donor. NADKs have been identified in bacteria, plants, vertebrates, and humans. NADKs form a multimeric state in solution and divalent metals, usually magnesium, are essential for carrying out ...
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