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NADPH is used as a reducing agent in many anabolic reactions. Proton translocating NAD(P) + transhydrogenase is one of the main ways that cells can regenerate NADPH after it is used. In E. coli, this pathway contribute equal amounts of NADPH as the pentose phosphate pathway, and both were the main producers of NADPH under standard growth ...
GAPN is used in a variant of glycolysis that conserves energy as NADPH rather than as ATP. The NADPH and 3-PG can then be used for synthesis. The most familiar variant of glycolysis uses glyceraldehyde-3-phosphate dehydrogenase (GAPDH) and phosphoglycerate kinase to produce ATP. GAPDH is phosphorylating. GAPN is non-phosphorylating.
In biochemistry, NAD(P) + transhydrogenase (Si-specific) (EC 1.6.1.1) is an enzyme that catalyzes the chemical reaction. NADPH + NAD + NADP + + NADH. Thus, the two substrates of this enzyme are NADPH and NAD +, whereas its two products are NADP + and NADH. This enzyme participates in nicotinate and nicotinamide metabolism.
d -Glucose + 2 [NAD] + + 2 [ADP] + 2 [P] i 2 × Pyruvate 2 × + 2 [NADH] + 2 H + + 2 [ATP] + 2 H 2 O Glycolysis pathway overview The use of symbols in this equation makes it appear unbalanced with respect to oxygen atoms, hydrogen atoms, and charges. Atom balance is maintained by the two phosphate (P i) groups: Each exists in the form of a hydrogen phosphate anion, dissociating to contribute ...
The pentose phosphate pathway (also called the phosphogluconate pathway and the hexose monophosphate shunt or HMP shunt) is a metabolic pathway parallel to glycolysis. [1] It generates NADPH and pentoses (five-carbon sugars) as well as ribose 5-phosphate, a precursor for the synthesis of nucleotides. [1]
Transhydrogenase may stand for NAD(P)+ transhydrogenase (Re/Si-specific) NAD(P)+ transhydrogenase (Si-specific) Proton-Translocating NAD(P)+ Transhydrogenase; Hydroxyacid-oxoacid transhydrogenase; Glutathione—cystine transhydrogenase; Lactate—malate transhydrogenase; Glutathione—homocystine transhydrogenase; Glutathione—CoA-glutathione ...
In biochemical reactions, the redox reactions are sometimes more difficult to see, such as this reaction from glycolysis: P i + glyceraldehyde-3-phosphate + NAD + → NADH + H + + 1,3-bisphosphoglycerate. In this reaction, NAD + is the oxidant (electron acceptor), and glyceraldehyde-3-phosphate is the reductant (electron donor).
The net effect of the malate–aspartate shuttle is purely redox: NADH in the cytosol is oxidized to NAD +, and NAD + in the matrix is reduced to NADH. The NAD + in the cytosol can then be reduced again by another round of glycolysis, and the NADH in the matrix can be used to pass electrons to the electron transport chain so ATP can be synthesized.