Record Information |
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Version | 5.0 |
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Status | Detected and Quantified |
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Creation Date | 2005-11-16 15:48:42 UTC |
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Update Date | 2023-02-21 17:14:39 UTC |
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HMDB ID | HMDB0000250 |
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Secondary Accession Numbers | |
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Metabolite Identification |
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Common Name | Pyrophosphate |
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Description | The anion, the salts, and the esters of pyrophosphoric acid are called pyrophosphates. The pyrophosphate anion is abbreviated PPi and is formed by the hydrolysis of ATP into AMP in cells. This hydrolysis is called pyrophosphorolysis. The pyrophosphate anion has the structure P2O74-, and is an acid anhydride of phosphate. It is unstable in aqueous solution and rapidly hydrolyzes into inorganic phosphate. Pyrophosphate is an osteotoxin (arrests bone development) and an arthritogen (promotes arthritis). It is also a metabotoxin (an endogenously produced metabolite that causes adverse health affects at chronically high levels). Chronically high levels of pyrophosphate are associated with hypophosphatasia. Hypophosphatasia (also called deficiency of alkaline phosphatase or phosphoethanolaminuria) is a rare, and sometimes fatal, metabolic bone disease. Hypophosphatasia is associated with a molecular defect in the gene encoding tissue non-specific alkaline phosphatase (TNSALP). TNSALP is an enzyme that is tethered to the outer surface of osteoblasts and chondrocytes. TNSALP hydrolyzes several substances, including inorganic pyrophosphate (PPi) and pyridoxal 5'-phosphate (PLP), a major form of vitamin B6. When TSNALP is low, inorganic pyrophosphate (PPi) accumulates outside of cells and inhibits the formation of hydroxyapatite, one of the main components of bone, causing rickets in infants and children and osteomalacia (soft bones) in adults. Vitamin B6 must be dephosphorylated by TNSALP before it can cross the cell membrane. Vitamin B6 deficiency in the brain impairs synthesis of neurotransmitters which can cause seizures. In some cases, a build-up of calcium pyrophosphate dihydrate crystals in the joints can cause pseudogout. |
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Structure | InChI=1S/H4O7P2/c1-8(2,3)7-9(4,5)6/h(H2,1,2,3)(H2,4,5,6) |
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Synonyms | Value | Source |
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[(HO)2P(O)OP(O)(OH)2] | ChEBI | Acide diphosphorique | ChEBI | Diphosphorsaeure | ChEBI | H4P2O7 | ChEBI | Pyrophosphoric acid | ChEBI | Pyrophosphorsaeure | ChEBI | Diphosphoric acid | Kegg | PPi | Kegg | Diphosphate | Generator | PYROphosphATE | ChEBI | Na4p2O7 | MeSH, HMDB | PPi CPD | MeSH, HMDB |
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Chemical Formula | H4O7P2 |
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Average Molecular Weight | 177.9751 |
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Monoisotopic Molecular Weight | 177.943225506 |
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IUPAC Name | (phosphonooxy)phosphonic acid |
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Traditional Name | pyrophosphoric acid |
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CAS Registry Number | 14000-31-8 |
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SMILES | OP(O)(=O)OP(O)(O)=O |
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InChI Identifier | InChI=1S/H4O7P2/c1-8(2,3)7-9(4,5)6/h(H2,1,2,3)(H2,4,5,6) |
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InChI Key | XPPKVPWEQAFLFU-UHFFFAOYSA-N |
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Chemical Taxonomy |
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Description | Belongs to the class of inorganic compounds known as non-metal pyrophosphates. These are inorganic non-metallic compounds containing a pyrophosphate as its largest oxoanion. |
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Kingdom | Inorganic compounds |
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Super Class | Homogeneous non-metal compounds |
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Class | Non-metal oxoanionic compounds |
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Sub Class | Non-metal pyrophosphates |
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Direct Parent | Non-metal pyrophosphates |
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Alternative Parents | |
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Substituents | - Non-metal pyrophosphate
- Inorganic oxide
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Molecular Framework | Not Available |
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External Descriptors | |
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Ontology |
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Physiological effect | Not Available |
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Disposition | Not Available |
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Process | Not Available |
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Role | Not Available |
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Physical Properties |
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State | Solid |
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Experimental Molecular Properties | Property | Value | Reference |
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Melting Point | 61 °C | Not Available | Boiling Point | Not Available | Not Available | Water Solubility | Not Available | Not Available | LogP | Not Available | Not Available |
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Experimental Chromatographic Properties | Not Available |
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Predicted Molecular Properties | |
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Predicted Chromatographic Properties | Predicted Collision Cross SectionsPredicted Kovats Retention IndicesUnderivatizedDerivatizedDerivative Name / Structure | SMILES | Kovats RI Value | Column Type | Reference |
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Pyrophosphate,1TMS,isomer #1 | C[Si](C)(C)OP(=O)(O)OP(=O)(O)O | 1707.5 | Semi standard non polar | 33892256 | Pyrophosphate,1TMS,isomer #1 | C[Si](C)(C)OP(=O)(O)OP(=O)(O)O | 1619.8 | Standard non polar | 33892256 | Pyrophosphate,1TMS,isomer #1 | C[Si](C)(C)OP(=O)(O)OP(=O)(O)O | 2406.6 | Standard polar | 33892256 | Pyrophosphate,2TMS,isomer #1 | C[Si](C)(C)OP(=O)(O[Si](C)(C)C)OP(=O)(O)O | 1727.8 | Semi standard non polar | 33892256 | Pyrophosphate,2TMS,isomer #1 | C[Si](C)(C)OP(=O)(O[Si](C)(C)C)OP(=O)(O)O | 1745.4 | Standard non polar | 33892256 | Pyrophosphate,2TMS,isomer #1 | C[Si](C)(C)OP(=O)(O[Si](C)(C)C)OP(=O)(O)O | 2085.9 | Standard polar | 33892256 | Pyrophosphate,2TMS,isomer #2 | C[Si](C)(C)OP(=O)(O)OP(=O)(O)O[Si](C)(C)C | 1707.6 | Semi standard non polar | 33892256 | Pyrophosphate,2TMS,isomer #2 | C[Si](C)(C)OP(=O)(O)OP(=O)(O)O[Si](C)(C)C | 1695.4 | Standard non polar | 33892256 | Pyrophosphate,2TMS,isomer #2 | C[Si](C)(C)OP(=O)(O)OP(=O)(O)O[Si](C)(C)C | 2101.0 | Standard polar | 33892256 | Pyrophosphate,3TMS,isomer #1 | C[Si](C)(C)OP(=O)(O)OP(=O)(O[Si](C)(C)C)O[Si](C)(C)C | 1712.4 | Semi standard non polar | 33892256 | Pyrophosphate,3TMS,isomer #1 | C[Si](C)(C)OP(=O)(O)OP(=O)(O[Si](C)(C)C)O[Si](C)(C)C | 1768.3 | Standard non polar | 33892256 | Pyrophosphate,3TMS,isomer #1 | C[Si](C)(C)OP(=O)(O)OP(=O)(O[Si](C)(C)C)O[Si](C)(C)C | 1946.9 | Standard polar | 33892256 | Pyrophosphate,4TMS,isomer #1 | C[Si](C)(C)OP(=O)(O[Si](C)(C)C)OP(=O)(O[Si](C)(C)C)O[Si](C)(C)C | 1771.1 | Semi standard non polar | 33892256 | Pyrophosphate,4TMS,isomer #1 | C[Si](C)(C)OP(=O)(O[Si](C)(C)C)OP(=O)(O[Si](C)(C)C)O[Si](C)(C)C | 1798.7 | Standard non polar | 33892256 | Pyrophosphate,4TMS,isomer #1 | C[Si](C)(C)OP(=O)(O[Si](C)(C)C)OP(=O)(O[Si](C)(C)C)O[Si](C)(C)C | 1814.7 | Standard polar | 33892256 | Pyrophosphate,1TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)OP(=O)(O)OP(=O)(O)O | 1971.0 | Semi standard non polar | 33892256 | Pyrophosphate,1TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)OP(=O)(O)OP(=O)(O)O | 1837.6 | Standard non polar | 33892256 | Pyrophosphate,1TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)OP(=O)(O)OP(=O)(O)O | 2549.1 | Standard polar | 33892256 | Pyrophosphate,2TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)OP(=O)(O[Si](C)(C)C(C)(C)C)OP(=O)(O)O | 2163.0 | Semi standard non polar | 33892256 | Pyrophosphate,2TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)OP(=O)(O[Si](C)(C)C(C)(C)C)OP(=O)(O)O | 2117.0 | Standard non polar | 33892256 | Pyrophosphate,2TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)OP(=O)(O[Si](C)(C)C(C)(C)C)OP(=O)(O)O | 2375.6 | Standard polar | 33892256 | Pyrophosphate,2TBDMS,isomer #2 | CC(C)(C)[Si](C)(C)OP(=O)(O)OP(=O)(O)O[Si](C)(C)C(C)(C)C | 2149.1 | Semi standard non polar | 33892256 | Pyrophosphate,2TBDMS,isomer #2 | CC(C)(C)[Si](C)(C)OP(=O)(O)OP(=O)(O)O[Si](C)(C)C(C)(C)C | 2140.2 | Standard non polar | 33892256 | Pyrophosphate,2TBDMS,isomer #2 | CC(C)(C)[Si](C)(C)OP(=O)(O)OP(=O)(O)O[Si](C)(C)C(C)(C)C | 2412.2 | Standard polar | 33892256 | Pyrophosphate,3TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)OP(=O)(O)OP(=O)(O[Si](C)(C)C(C)(C)C)O[Si](C)(C)C(C)(C)C | 2308.3 | Semi standard non polar | 33892256 | Pyrophosphate,3TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)OP(=O)(O)OP(=O)(O[Si](C)(C)C(C)(C)C)O[Si](C)(C)C(C)(C)C | 2302.0 | Standard non polar | 33892256 | Pyrophosphate,3TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)OP(=O)(O)OP(=O)(O[Si](C)(C)C(C)(C)C)O[Si](C)(C)C(C)(C)C | 2297.6 | Standard polar | 33892256 | Pyrophosphate,4TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)OP(=O)(O[Si](C)(C)C(C)(C)C)OP(=O)(O[Si](C)(C)C(C)(C)C)O[Si](C)(C)C(C)(C)C | 2492.5 | Semi standard non polar | 33892256 | Pyrophosphate,4TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)OP(=O)(O[Si](C)(C)C(C)(C)C)OP(=O)(O[Si](C)(C)C(C)(C)C)O[Si](C)(C)C(C)(C)C | 2419.1 | Standard non polar | 33892256 | Pyrophosphate,4TBDMS,isomer #1 | CC(C)(C)[Si](C)(C)OP(=O)(O[Si](C)(C)C(C)(C)C)OP(=O)(O[Si](C)(C)C(C)(C)C)O[Si](C)(C)C(C)(C)C | 2236.7 | Standard polar | 33892256 |
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Spectra |
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| GC-MS SpectraSpectrum Type | Description | Splash Key | Deposition Date | Source | View |
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Experimental GC-MS | GC-MS Spectrum - Pyrophosphate GC-EI-TOF (Non-derivatized) | splash10-0002-0972000000-a80f120dd426991d6eff | 2017-09-12 | HMDB team, MONA, MassBank | View Spectrum | Experimental GC-MS | GC-MS Spectrum - Pyrophosphate GC-EI-TOF (Non-derivatized) | splash10-0udi-0741900000-9c5b3c334561dd282116 | 2017-09-12 | HMDB team, MONA, MassBank | View Spectrum | Experimental GC-MS | GC-MS Spectrum - Pyrophosphate GC-EI-TOF (Non-derivatized) | splash10-03di-0920000000-a5ad76aa129d898d71f8 | 2017-09-12 | HMDB team, MONA, MassBank | View Spectrum | Experimental GC-MS | GC-MS Spectrum - Pyrophosphate GC-EI-TOF (Non-derivatized) | splash10-03di-0910000000-531d3e19493dc29d6e5c | 2017-09-12 | HMDB team, MONA, MassBank | View Spectrum | Experimental GC-MS | GC-MS Spectrum - Pyrophosphate GC-MS (4 TMS) | splash10-0udi-0320900000-0abbcb28a43d7e24fe81 | 2018-05-17 | HMDB team, MONA, MassBank | View Spectrum | Experimental GC-MS | GC-MS Spectrum - Pyrophosphate GC-MS (Non-derivatized) | splash10-0udi-0320900000-0abbcb28a43d7e24fe81 | 2018-05-17 | HMDB team, MONA, MassBank | View Spectrum | Predicted GC-MS | Predicted GC-MS Spectrum - Pyrophosphate GC-MS (Non-derivatized) - 70eV, Positive | splash10-0002-9200000000-47d5c2340766aaf36e95 | 2016-09-22 | Wishart Lab | View Spectrum | Predicted GC-MS | Predicted GC-MS Spectrum - Pyrophosphate GC-MS (Non-derivatized) - 70eV, Positive | Not Available | 2021-10-12 | Wishart Lab | View Spectrum |
MS/MS SpectraSpectrum Type | Description | Splash Key | Deposition Date | Source | View |
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Experimental LC-MS/MS | LC-MS/MS Spectrum - Pyrophosphate Quattro_QQQ 10V, Positive-QTOF (Annotated) | splash10-004j-5900000000-6633d5123eb37c266247 | 2018-05-17 | HMDB team, MONA | View Spectrum | Experimental LC-MS/MS | LC-MS/MS Spectrum - Pyrophosphate Quattro_QQQ 25V, Positive-QTOF (Annotated) | splash10-0002-9000000000-1274b83242b279e9dac7 | 2018-05-17 | HMDB team, MONA | View Spectrum | Experimental LC-MS/MS | LC-MS/MS Spectrum - Pyrophosphate Quattro_QQQ 40V, Positive-QTOF (Annotated) | splash10-001i-9000000000-69bc4c795fec87fef4b8 | 2018-05-17 | HMDB team, MONA | View Spectrum | Experimental LC-MS/MS | LC-MS/MS Spectrum - Pyrophosphate QqQ 1V, negative-QTOF | splash10-0udi-0009000000-0d7e21d878a866bb58ce | 2020-07-22 | HMDB team, MONA | View Spectrum | Experimental LC-MS/MS | LC-MS/MS Spectrum - Pyrophosphate QqQ 2V, negative-QTOF | splash10-0a4i-0009000000-886725ef1e6e856bba4e | 2020-07-22 | HMDB team, MONA | View Spectrum | Experimental LC-MS/MS | LC-MS/MS Spectrum - Pyrophosphate QqQ 3V, negative-QTOF | splash10-0udi-0009000000-6ea52df356fc0219aae7 | 2020-07-22 | HMDB team, MONA | View Spectrum | Experimental LC-MS/MS | LC-MS/MS Spectrum - Pyrophosphate QqQ 4V, negative-QTOF | splash10-0udi-0009000000-bb05c17fd2d302e48d47 | 2020-07-22 | HMDB team, MONA | View Spectrum | Experimental LC-MS/MS | LC-MS/MS Spectrum - Pyrophosphate QqQ 5V, negative-QTOF | splash10-0udi-0109000000-884206603f4eb302c100 | 2020-07-22 | HMDB team, MONA | View Spectrum | Experimental LC-MS/MS | LC-MS/MS Spectrum - Pyrophosphate QqQ 6V, negative-QTOF | splash10-0udi-0109000000-f6479c3c70cf1da434a7 | 2020-07-22 | HMDB team, MONA | View Spectrum | Experimental LC-MS/MS | LC-MS/MS Spectrum - Pyrophosphate QqQ 7V, negative-QTOF | splash10-0udi-0219000000-8c9d253d3347c2b2a7b1 | 2020-07-22 | HMDB team, MONA | View Spectrum | Experimental LC-MS/MS | LC-MS/MS Spectrum - Pyrophosphate QqQ 8V, negative-QTOF | splash10-0ufr-0529000000-40db63b6f9bc6df64259 | 2020-07-22 | HMDB team, MONA | View Spectrum | Experimental LC-MS/MS | LC-MS/MS Spectrum - Pyrophosphate QqQ 9V, negative-QTOF | splash10-0a6r-0938000000-128abea42399dbbd6b73 | 2020-07-22 | HMDB team, MONA | View Spectrum | Experimental LC-MS/MS | LC-MS/MS Spectrum - Pyrophosphate QqQ 10V, negative-QTOF | splash10-004i-0923000000-bf96528807a30d13e941 | 2020-07-22 | HMDB team, MONA | View Spectrum | Experimental LC-MS/MS | LC-MS/MS Spectrum - Pyrophosphate QqQ 11V, negative-QTOF | splash10-004i-0922000000-7ba3aaba52e7bda31d59 | 2020-07-22 | HMDB team, MONA | View Spectrum | Experimental LC-MS/MS | LC-MS/MS Spectrum - Pyrophosphate QqQ 12V, negative-QTOF | splash10-004i-0911000000-729a221aabae27701a80 | 2020-07-22 | HMDB team, MONA | View Spectrum | Experimental LC-MS/MS | LC-MS/MS Spectrum - Pyrophosphate QqQ 13V, negative-QTOF | splash10-004i-0910000000-2fc64e199062885202b2 | 2020-07-22 | HMDB team, MONA | View Spectrum | Experimental LC-MS/MS | LC-MS/MS Spectrum - Pyrophosphate QqQ 14V, negative-QTOF | splash10-004i-0910000000-0d1641e2522b985110a8 | 2020-07-22 | HMDB team, MONA | View Spectrum | Experimental LC-MS/MS | LC-MS/MS Spectrum - Pyrophosphate QqQ 15V, negative-QTOF | splash10-004i-0910000000-fca1eea6589ac6828b32 | 2020-07-22 | HMDB team, MONA | View Spectrum | Experimental LC-MS/MS | LC-MS/MS Spectrum - Pyrophosphate QqQ 16V, negative-QTOF | splash10-004i-0900000000-6fae5d4a6887e1ace201 | 2020-07-22 | HMDB team, MONA | View Spectrum | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Pyrophosphate 10V, Positive-QTOF | splash10-004j-4900000000-fab623ebd43ab1452b9f | 2015-09-15 | Wishart Lab | View Spectrum | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Pyrophosphate 20V, Positive-QTOF | splash10-0002-9400000000-b2565f0d436385569cff | 2015-09-15 | Wishart Lab | View Spectrum | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Pyrophosphate 40V, Positive-QTOF | splash10-000t-9300000000-ac978f84efc222da7b43 | 2015-09-15 | Wishart Lab | View Spectrum | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Pyrophosphate 10V, Negative-QTOF | splash10-004i-0900000000-21c64963e1ff18b360e1 | 2015-09-15 | Wishart Lab | View Spectrum | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Pyrophosphate 20V, Negative-QTOF | splash10-004i-9700000000-54e41043f009fe6db86c | 2015-09-15 | Wishart Lab | View Spectrum | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - Pyrophosphate 40V, Negative-QTOF | splash10-004i-9000000000-2a5f69c16aa671275a62 | 2015-09-15 | Wishart Lab | View Spectrum |
IR SpectraSpectrum Type | Description | Deposition Date | Source | View |
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Predicted IR Spectrum | IR Ion Spectrum (Predicted IRIS Spectrum, Adduct: [M-H]-) | 2023-02-03 | FELIX lab | View Spectrum | Predicted IR Spectrum | IR Ion Spectrum (Predicted IRIS Spectrum, Adduct: [M+H]+) | 2023-02-03 | FELIX lab | View Spectrum | Predicted IR Spectrum | IR Ion Spectrum (Predicted IRIS Spectrum, Adduct: [M+Na]+) | 2023-02-03 | FELIX lab | View Spectrum |
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Biological Properties |
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Cellular Locations | - Cytoplasm
- Mitochondria
- Nucleus
- Endoplasmic reticulum
- Peroxisome
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Biospecimen Locations | |
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Tissue Locations | - Epidermis
- Fibroblasts
- Intestine
- Neuron
- Platelet
- Prostate
- Skeletal Muscle
- Testis
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Pathways | |
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Normal Concentrations |
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Blood | Detected and Quantified | 1.8 (0.64-2.96) uM | Adult (>18 years old) | Both | Normal | | details | Saliva | Detected but not Quantified | Not Quantified | Adult (>18 years old) | Male | Normal | | details | Saliva | Detected but not Quantified | Not Quantified | Adult (>18 years old) | Male | Normal | | details | Saliva | Detected but not Quantified | Not Quantified | Adult (>18 years old) | Male | Normal | | details | Saliva | Detected but not Quantified | Not Quantified | Adult (>18 years old) | Male | Normal | | details | Saliva | Detected but not Quantified | Not Quantified | Adult (>18 years old) | Male | Normal | | details | Saliva | Detected but not Quantified | Not Quantified | Adult (>18 years old) | Male | Normal | | details | Saliva | Detected but not Quantified | Not Quantified | Adult (>18 years old) | Male | Normal | | details | Saliva | Detected but not Quantified | Not Quantified | Adult (>18 years old) | Male | Normal | | details | Saliva | Detected but not Quantified | Not Quantified | Adult (>18 years old) | Male | Normal | | details | Saliva | Detected but not Quantified | Not Quantified | Adult (>18 years old) | Male | Normal | | details | Urine | Detected and Quantified | 2.56 +/- 1.22 umol/mmol creatinine | Children (1-13 years old) | Both | Normal | | details |
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Abnormal Concentrations |
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Urine | Detected but not Quantified | Not Quantified | Adult (>18 years old) | Both | Bladder cancer | | details |
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Associated Disorders and Diseases |
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Disease References | None |
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Associated OMIM IDs | None |
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External Links |
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DrugBank ID | DB04160 |
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Phenol Explorer Compound ID | Not Available |
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FooDB ID | Not Available |
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KNApSAcK ID | C00019561 |
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Chemspider ID | Not Available |
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KEGG Compound ID | C00013 |
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BioCyc ID | PPI |
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BiGG ID | Not Available |
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Wikipedia Link | Pyrophosphate |
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METLIN ID | Not Available |
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PubChem Compound | 1023 |
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PDB ID | Not Available |
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ChEBI ID | 29888 |
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Food Biomarker Ontology | Not Available |
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VMH ID | Not Available |
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MarkerDB ID | Not Available |
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Good Scents ID | Not Available |
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References |
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Synthesis Reference | Dittmer, Donald C.; Silverstein, V. Opshelor. Production of pyrophosphate from S-n-butyl phosphorothioate. Journal of Organic Chemistry (1961), 26 4706-7. |
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Material Safety Data Sheet (MSDS) | Download (PDF) |
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