| prelycopersene pyrophosphate synthetase | <chemical> Synonym: prephytoene pyrophosphate synthetase, prephytoene synthase (26 Jun 1999) |
|---|---|
| prephytoene pyrophosphate dehydrogenase | <enzyme> Encoded by gene crte; reaction product of above enzyme is a phytoene; gene found in the cyanella (plastid) DNA of an eukaryotic alga, cyanophora paradoxa; amino acid sequence given in first source Registry number: EC 1.- Synonym: ppp-dehydrogenase, crte gene product, geranylgeranyl pyrophosphate synthase, geranylgeranyl-pyrophosphate synthase, albino-3 gene product (26 Jun 1999) |
| pyrophosphate | <chemistry> Two phosphate groups linked by esterification. Released in many of the synthetic steps involving nucleotide triphosphates (e.g. Protein and nucleic acid elongation). Rapid cleavage by enzymes that have high substrate affinity ensures that these reactions are essentially irreversible. (18 Nov 1997) |
| pyrophosphate-nucleoside kinase | <enzyme> From acholeplasma laidlawii; phosphorylates adenosine, inosine, and guanosine to the corresponding mononucleotides Registry number: EC 2.7.1.- Synonym: ppi dependent nucleoside kinase (26 Jun 1999) |
| pyrophosphate-protein phosphotransferase | <enzyme> Not dependent on ATP; inhibited by fluoride Registry number: EC 2.7.1.- (26 Jun 1999) |
| pyrophosphate-serine phosphotransferase | <enzyme> Catalyses the conversion of pyrophosphate and serine to form phosphoserine and orthophosphate Registry number: EC 2.7.1.80 (26 Jun 1999) |
| pyrophosphate translocase | <enzyme> A component of the glucose-6-phosphatase (g6pase, EC 3.1.3.9) enzyme complex; facilitates the transfer of pyrophosphate between the cell cytosol and the lumen of the endoplasmic reticulum where the g6pase enzyme is situated Registry number: EC 2.7.- (26 Jun 1999) |
| nucleotide pyrophosphate transferase | <enzyme> Transfers the beta, gamma pyrophosphate group from ATP to 3'-hydroxy group of ribonucleotides, oligonucleotides or trna Registry number: EC 2.7.6.- (26 Jun 1999) |
| decaprenyl pyrophosphate synthetase | <enzyme> Forms all-trans-decaprenyl pyrophosphate from isopentenyl pyrophosphate and either farnesyl pyrophosphate or geranylgeranyl pyrophosphate; does not transfer dimethylallyl or geranyl groups Registry number: EC 2.5.1.- Synonym: dp-pp-synthetase (26 Jun 1999) |
| diacylglycerol pyrophosphate phosphatase | <enzyme> Catalyses the dephosphorylation of the beta phosphate of diacylglycerol pyrophosphate (dgpp) to produce phosphatidate and p(i) Registry number: EC 3.6.1.- Synonym: dgpp phosphatase (26 Jun 1999) |
| octaprenyl pyrophosphate synthetase | <enzyme> E. Coli enzyme catalyses the condensation of isopentenyl pyrophosphate with farnesyl pyrophosphate to yield octaprenyl pyrophosphate Registry number: EC 2.5.1.- Synonym: octaprenyl diphosphate synthase (26 Jun 1999) |
| technetium tc 99m pyrophosphate | <chemical> A radionuclide imaging agent used primarily in scintigraphy or tomography of the heart to evaluate the extent of the necrotic myocardial process. It has also been used in noninvasive tests for the distribution of organ involvement in different types of amyloidosis and for the evaluation of muscle necrosis in the extremities. Pharmacological action: radiopharmaceuticals, (12 Dec 1998) |
| terpenyl pyrophosphate hydrolase | <enzyme> Hydrolyzes bornyl pyrophosphate to bornyl phosphate Registry number: EC 3.6.1.- (26 Jun 1999) |
| tetraethyl pyrophosphate | Et4P2O7; [(EtO)2PO]2O;an organic phosphoric compound used as an insecticide; a potent irreversible cholinesterase inhibitor. Acronym: TEPP (05 Mar 2000) |
| thiamine pyrophosphate | <biochemistry> Co carboxylase. A cofactor that has an unusually acidic carbon atom able to form carbon carbon bonds. Found in pyruvate dehydrogenase and transketolase. (18 Nov 1997) |