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A number of pyrophosphate salts exist, such as disodium pyrophosphate (Na 2 H 2 P 2 O 7) and tetrasodium pyrophosphate (Na 4 P 2 O 7), among others. Often pyrophosphates are called diphosphates. The parent pyrophosphates are derived from partial or complete neutralization of pyrophosphoric acid.
The pyrophosphate produced by NPP1 in bone cells is thought to serve as both a phosphate source for calcium phosphate deposition and as an inhibitory modulator of calcification. [17] NPP1 appears to be important for maintaining pyrophosphate/phosphate balance.
Inorganic pyrophosphatase, which acts upon the free pyrophosphate ion; Tobacco acid pyrophosphatase, which catalyses the hydrolysis of a phosphoric ester; Various organic pyrophosphatases, which act upon organic molecules with the pyrophosphate group (but excluding triphosphatases that act on the final bond): Thiamine pyrophosphatase
Inorganic pyrophosphatase (or inorganic diphosphatase, PPase) is an enzyme (EC 3.6.1.1) that catalyzes the conversion of one ion of pyrophosphate to two phosphate ions. [1] This is a highly exergonic reaction, and therefore can be coupled to unfavorable biochemical transformations in order to drive these transformations to completion. [2]
The pathway produces two five-carbon building blocks called isopentenyl pyrophosphate (IPP) and dimethylallyl pyrophosphate (DMAPP), which are used to make isoprenoids, a diverse class of over 30,000 biomolecules such as cholesterol, vitamin K, coenzyme Q10, and all steroid hormones. [2]
The last one is pyrophosphate [P 2 O 7] 4−. The pyrophosphates are mostly water-soluble. The pyrophosphates are mostly water-soluble. Likewise, tripolyphosphoric acid H 5 P 3 O 10 yields at least five anions [H 5− k P 3 O 10 ] k − , where k ranges from 1 to 5, including tripolyphosphate [P 3 O 10 ] 5− .
Ribose-phosphate diphosphokinase (or phosphoribosyl pyrophosphate synthetase or ribose-phosphate pyrophosphokinase) is an enzyme that converts ribose 5-phosphate into phosphoribosyl pyrophosphate (PRPP). [1] [2] It is classified under EC 2.7.6.1.
Pyrosequencing is a method of DNA sequencing (determining the order of nucleotides in DNA) based on the "sequencing by synthesis" principle, in which the sequencing is performed by detecting the nucleotide incorporated by a DNA polymerase.
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