Nicotinamide adenine dinucleotide phosphate
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| ECHA InfoCard | 100.000.163 |
| MeSH | NADP |
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| Properties | |
| C21H28N7O17P3+ (oxidized) C21H29N7O17P3 (reduced) | |
| Molar mass | 744.4 g/mol (oxidized) 745.4 g/mol (reduced) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Nicotinamide adenine dinucleotide phosphate, abbreviated NADP or, in older notation, TPN (triphosphopyridine nucleotide), is a cofactor used in anabolic reactions, such as the Calvin cycle and lipid and nucleic acid syntheses, which require NADPH as a reducing agent ('hydrogen source'). NADPH is the reduced form, whereas NADP+ is the oxidized form. NADP+ is used by all forms of cellular life. NADP+ is essential for life because it is needed for cellular respiration.
NADP+ differs from NAD+ by the presence of an additional phosphate group on the 2' position of the ribose ring that carries the adenine moiety. This extra phosphate is added by NAD+ kinase and removed by NADP+ phosphatase.