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Ferredoxin: NADP + reductase is the last enzyme in the transfer of electrons during photosynthesis from photosystem I to NADPH. [2] The NADPH is then used as a reducing equivalent in the reactions of the Calvin cycle. [2] Electron cycling from ferredoxin to NADPH only occurs in the light in part because FNR activity is inhibited in the dark. [11]
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 ...
This equation is the equation of a straight line for as a function of pH with a slope of () volt (pH has no units). This equation predicts lower E h {\displaystyle E_{h}} at higher pH values. This is observed for the reduction of O 2 into H 2 O, or OH − , and for reduction of H + into H 2 .
A biological coenzyme that acts as an electron carrier in enzymatic reactions. 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.
In enzymology, a hydrogen dehydrogenase (NADP+) (EC 1.12.1.3) is an enzyme that catalyzes the chemical reaction H 2 + NADP + ⇌ {\displaystyle \rightleftharpoons } H + + NADPH Thus, the two substrates of this enzyme are H 2 and NADP + , whereas its two products are H + and NADPH .
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.
Thus, the two substrates of this enzyme are (S)-malate and NADP +, whereas its 3 products are pyruvate, CO 2, and NADPH. 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.
In enzymology, a mevaldate reductase (NADPH) (EC 1.1.1.33) is an enzyme that catalyzes the chemical reaction (R)-mevalonate + NADP + ⇌ {\displaystyle \rightleftharpoons } mevaldate + NADPH + H + Thus, the two substrates of this enzyme are (R)-mevalonate and NADP + , whereas its 3 products are mevaldate, NADPH , and H + .