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Pyrophosphorolysis is the reverse of the polymerization reaction in which pyrophosphate reacts with the 3′-nucleosidemonophosphate (NMP or dNMP), which is removed from the oligonucleotide to release the corresponding triphosphate (dNTP from DNA, or NTP from RNA). The pyrophosphate anion has the structure P 2 O 4− 7, and is an acid anhydride ...
Pyrophosphate anion. Trimethyl orthophosphate. Removal of protons ( H + ) from k hydroxyl groups –OH leaves anions generically called phosphates (if k = n − 2 x + 2 ) or hydrogen phosphates (if k is between 1 and n − 2 x + 1 ), with general formula [H n −2 x +2− k P n O 3 n +1− x ] k − .
In chemistry, a phosphate is an anion, salt, functional group or ester derived from a phosphoric acid. It most commonly means orthophosphate, a derivative of orthophosphoric acid, a.k.a. phosphoric acid H 3 PO 4. The phosphate or orthophosphate ion [PO 4] 3− is derived from phosphoric acid by the removal of three protons H +.
Disodium pyrophosphate or sodium acid pyrophosphate (SAPP) [1] is an inorganic compound with the chemical formula Na 2 H 2 P 2 O 7. It consists of sodium cations (Na +) and dihydrogen pyrophosphate anions (H 2 P 2 O 2− 7). It is a white, water-soluble solid that serves as a buffering and chelating agent, with many applications in the food ...
The pKa's occur in two distinct ranges because deprotonations occur on separate phosphate groups. For comparison with the pKa's for phosphoric acid are 2.14, 7.20, and 12.37. At physiological pH's, pyrophosphate exists as a mixture of doubly and singly protonated forms.
Thiamine pyrophosphate is a cofactor that is present in all living systems, in which it catalyzes several biochemical reactions. Thiamine pyrophosphate is synthesized in the cytosol and is required in the cytosol for the activity of transketolase and in the mitochondria for the activity of pyruvate-, oxoglutarate- and branched chain keto acid ...
High-energy phosphate bonds are usually pyrophosphate bonds, acid anhydride linkages formed by taking phosphoric acid derivatives and dehydrating them. As a consequence, the hydrolysis of these bonds is exergonic under physiological conditions, releasing Gibbs free energy. [citation needed]
Calcium pyrophosphate refers to any member of a series of inorganic compound with the formula Ca 2 P 2 O 7 (H 2 O) n.They are white solids that are insoluble in water. They contain the pyrophosphate anion, although sometimes they are referred to as phosphates.