| Tc | correlation time; technetium; tetracycline; transcobalamin |
|---|---|
| TSC | technetium sulfur colloid; thiosemicarbazide; transverse spinal sclerosis; tuberous sclerosis |
| CS | calf serum; campomelic syndrome; carcinoid syndrome; cardiogenic shock; caries-susceptible; carotid ... |
| DRS | descending rectal septum; diagnostic review station; Division of Research Services [NIH]; drowsiness... |
| ES | ejection sound; elastic stocking; electrical stimulus, electrical stimulation; electroshock; emergen... |
| technetium | <radiology> Tc-99m, half-life: 6.03 hr, decay: isomeric transition, radiation: gamma, 140 keV (98%) (12 Dec 1998) |
|---|---|
| technetium-99 | A radioisotope of technetium which is the decay product of technetium-99m and has a weak beta emission and a physical half-life of 213,000 years. (05 Mar 2000) |
| technetium compounds | Inorganic compounds that contain technetium as an integral part of the molecule. (12 Dec 1998) |
| alpha-hydroxyethylthiamin pyrophosphate | The activated form of acetaldehyde that is formed during the decarboxylation of active pyruvate. Formed in alcohol fermentation and in carbohydrate metabolism. Synonym: a-hydroxyethylthiamin pyrophosphate. (05 Mar 2000) |
| alpha-lactyl-thiamin pyrophosphate | An intermediate formed in the oxidative decarboxylation of pyruvate. Compare: pyruvate dehydrogenase (lipoamide). Synonym: alpha-lactyl-thiamin pyrophosphate. (05 Mar 2000) |
| aneurine pyrophosphate | The diphosphoric ester of thiamin, a coenzyme of several (de)carboxylases, transketolases, and alpha-oxoacid dehydrogenases. Synonym: aneurine pyrophosphate, cocarboxylase, diphosphothiamin. (05 Mar 2000) |
| calcium pyrophosphate | <chemical> Diphosphoric acid, calcium salt. An inorganic pyrophosphate which affects calcium metabolism in mammals. Abnormalities in its metabolism occur in some human diseases, notably hypophosphatasia and pseudogout. Chemical name: Diphosphoric acid, calcium salt (12 Dec 1998) |
| calcium pyrophosphate deposition disease | <radiology> Manifestations can occur singly or in any combination, pseudogout, acute crystal-induced synovitis with clinical symptoms analogous to gout, arthropathy, beaklike osteophytes of 2nd, 3rd metacarpal heads, subchondral cysts (especially carpal bones), unusual distribution of disease (radiocarpal/ulnar joint, patellofemoral joint), SLAC - scapholunate advanced collapse, chondrocalcinosis, triangular fibrocartilage, symphysis pubis, menisci of knee, annulus fibrosus of intervertebral disk (12 Dec 1998) |
| geranylgeranyl pyrophosphate | A key intermediate in the biosynthesis of many terpenes. (05 Mar 2000) |
| geranyl pyrophosphate | A key intermediate in the biosynthesis of sterols, dolichols, ubiquinone, and prenylated proteins. (05 Mar 2000) |
| geranyl pyrophosphate-sabinene hydrate cyclase | <enzyme> Enzyme from sweet marjoram; catalyses cation-dependent cyclization of geranyl pyrophosphate to cis and trans sabinene hydrate, deriving oh from water, not from the pyrophosphate ester Registry number: EC 5.5.- Synonym: sabinene hydrate cyclase, sabinene hydrate synthase (26 Jun 1999) |
| phosphoribosyl pyrophosphate | <chemical> The key substance in the biosynthesis of histidine, tryptophan, and purine and pyrimidine nucleotides. Chemical name: alpha-D-Ribofuranose, 5-(dihydrogen phosphate) 1-(trihydrogen diphosphate) (12 Dec 1998) |
| 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) |