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Nicotinamide adenine dinucleotide phosphate, abbreviated NADP [1] [2] 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 ...
NADP is a reducing agent in anabolic reactions like the Calvin cycle and lipid and nucleic acid syntheses. NADP exists in two forms: NADP+, the oxidized form, and NADPH, the reduced form. NADP is similar to nicotinamide adenine dinucleotide (NAD), but NADP has a phosphate group at the C-2′ position of the adenosyl.
NADPH oxidase (nicotinamide adenine dinucleotide phosphate oxidase) is a membrane-bound enzyme complex that faces the extracellular space. It can be found in the plasma membrane as well as in the membranes of phagosomes used by neutrophil white blood cells to engulf microorganisms.
The ratio of NADPH:NADP + is the primary mode of regulation for the enzyme and is normally about 100:1 in liver cytosol [citation needed]. This makes the cytosol a highly-reducing environment. An NADPH-utilizing pathway forms NADP +, which stimulates Glucose-6-phosphate dehydrogenase to produce more NADPH.
In enzymology, a malate dehydrogenase (NADP +) (EC 1.1.1.82) is an enzyme that catalyzes the chemical reaction (S)-malate + NADP + ⇌ {\displaystyle \rightleftharpoons } oxaloacetate + NADPH + H + Thus, the two substrates of this enzyme are (S)-malate and NADP + , whereas its 3 products are oxaloacetate , NADPH , and H + .
Malate is oxidized to pyruvate and CO 2, and NADP + is reduced to NADPH. This enzyme belongs to the family of oxidoreductases, to be specific those acting on the CH-OH group of donor with NAD + or NADP + as acceptor. The systematic name of this enzyme class is (S)-malate:NADP + oxidoreductase (oxaloacetate-decarboxylating).
D-glucose + NADP + D-glucono-1,5-lactone + NADPH + H + Thus, the two substrates of this enzyme are D-glucose and NADP + , whereas its 3 products are D-glucono-1,5-lactone , NADPH , and H + . This enzyme belongs to the family of oxidoreductases , specifically those acting on the CH-OH group of donor with NAD + or NADP + as acceptor.
In enzymology, a NAD + diphosphatase (EC 3.6.1.22) is an enzyme that catalyzes the chemical reaction. NAD + + H 2 O AMP + NMN. Thus, the two substrates of this enzyme are NAD + and H 2 O, whereas its two products are AMP and NMN.