In chemistry, the anion, the salts, and the esters of pyrophosphoric acid are called pyrophosphates. Ball-and-stick models and Space-filling models (also known as Calotte models) are 3D or spatial Molecular models which serve to display the structure Chemistry (from Egyptian kēme (chem meaning "earth") is the Science concerned with the composition structure and properties An ion is an Atom or Molecule which has lost or gained one or more Valence electrons giving it a positive or negative electrical charge Salt is a Dietary mineral composed primarily of Sodium chloride that is essential for Animal life but toxic to most land plants Esters are a class of Chemical compounds and Functional groups Esters consist of an inorganic or organic Acid in which at least Pyrophosphoric acid, also known under the name diphosphoric acid, is a syrupy liquid or a viscous off-white solid The anion P₂O₇⁴⁻ is abbreviated PP_i and is formed by the hydrolysis of ATP into AMP in cells. Hydrolysis is a Chemical reaction during which one or more water molecules are split into hydrogen and hydroxide ions which may go on to participate in further reactions Adenosine-5'-triphosphate ( ATP) is a multifunctional Nucleotide that is most important as a " molecular currency" of intracellular Energy Adenosine monophosphate ( AMP) also known as 5'-adenylic acid, is a Nucleotide that is found in RNA. The cell is the structural and functional unit of all known living Organisms It is the smallest unit of an organism that is classified as living and is often called

• ATP → AMP + PP_i

For example, when a nucleotide is incorporated into a growing DNA or RNA strand by a polymerase, pyrophosphate (PPi) is released. Adenosine monophosphate ( AMP) also known as 5'-adenylic acid, is a Nucleotide that is found in RNA. Deoxyribonucleic acid ( DNA) is a Nucleic acid that contains the genetic instructions used in the development and functioning of all known Ribonucleic acid ( RNA) is a Nucleic acid that consists of a long chain of Nucleotide units A polymerase (EC 2776/7/19/48/49 is an Enzyme whose central function is associated with Polymers of Nucleic acids such as RNA and DNA Pyrophosphorolysis is the reverse of the polymerization reaction where pyrophosphate reacts with the 3'-nucleotidemonophosphate (NMP or dNMP), which is removed from the oligonucleotide to release the corresponding triphosphate (dNTP from DNA, or NTP from RNA). In Polymer chemistry, polymerization is a process of reacting Monomer Molecules together in a Chemical reaction to form three-dimensional networks An oligonucleotide (or oligo) is a short segment of RNA or DNA, typically with twenty or fewer bases.

The pyrophosphate anion has the structure P₂O₇⁴⁻, and is an acid anhydride of phosphate. In Computer science, ACID ( Atomicity Consistency Isolation Durability) is a set of properties that guarantee that Database transactions are In Chemistry, an anhydride is a compound that can be considered as derived from another compound by subtracting the molecules of water. A phosphate, an Inorganic chemical, is a salt of Phosphoric acid. It is unstable in aqueous solution and rapidly hydrolyzes into inorganic phosphate:

• P₂O₇⁴⁻ + H₂O → 2 HPO₄²⁻

or in shorthand notation:

• PP_i + H₂O → 2 P_i

This hydrolysis to inorganic phosphate effectively renders the cleavage of ATP to AMP and PP_i irreversible, and biochemical reactions coupled to this hydrolysis are irreversible as well. Hydrolysis is a Chemical reaction during which one or more water molecules are split into hydrogen and hydroxide ions which may go on to participate in further reactions Hydrolysis is a Chemical reaction during which one or more water molecules are split into hydrogen and hydroxide ions which may go on to participate in further reactions

From the standpoint of high energy phosphate accounting, the hydrolysis of ATP to AMP and PP_i will require two high energy phosphates, as to reconstitute AMP into ATP will require two phosphorylation reactions. High-energy phosphate can mean one of two things The phosphate-phosphate bonds formed when compounds such as Adenosine diphosphate and Adenosine triphosphate

• AMP + ATP → 2 ADP
• 2 ADP + 2 P_i → 2 ATP

The synthesis of tetraethyl pyrophosphate was first described in 1854 by Philip de Clermount at a meeting of the French Academy of Sciences. Adenosine diphosphate, abbreviated ADP, is a Nucleotide. It is an Ester of Pyrophosphoric acid with the Nucleoside Adenosine

The term pyrophosphate is also the name of esters formed by the condensation of a phosphorylated biological compound with inorganic phosphate as for dimethylallyl pyrophosphate. A condensation reaction is a Chemical reaction in which two Molecules or moieties ( Functional groups) combine to form one single molecule together with Dimethylallyl pyrophosphate (or -diphosphate (DMAPP is an intermediate product of both Mevalonic acid (MVA pathway and DOXP/ MEP pathway This bond is also referred to as a high energy phosphate bond. High-energy phosphate can mean one of two things The phosphate-phosphate bonds formed when compounds such as Adenosine diphosphate and Adenosine triphosphate

See also

• Sodium pyrophosphate
• Calcium pyrophosphate dihydrate deposition disease

External links

• MeSH Pyrophosphates

Sodium pyrophosphate, also called tetrasodium pyrophosphate or tetrasodium phosphate, is a slightly Toxic and mildly irritating Colorless Calcium pyrophosphate deposition disease ( CPPD) is a rheumatologic disorder with varied clinical manifestations due to precipitation of Calcium pyrophosphate Medical Subject Headings ( MeSH) is a huge Controlled vocabulary (or metadata system for the purpose of indexing journal articles and books

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