tricarboxylic acid cycle


tricarboxylic acid cycle
tri·car·box·yl·ic acid cycle .trī-.kär-.bäk-.sil-ik- n KREBS CYCLE

* * *

the final common pathway for the oxidation to CO2 of fuel molecules, most of which enter the cycle as acetyl coenzyme A; it also provides intermediates for biosynthetic reactions. The cycle occurs in mitochondria and generates ATP by providing electrons to the electron transport chain. See illustration. Called also Krebs c. and citric acid c.

Tricarboxylic acid cycle. Diagrammatic representation of reactions by which carbon chains of sugars, fatty acids, and amino acids are metabolized to yield carbon dioxide. Water produced by the cycle and components of the high-energy phosphate pool generated by the associated electron chain are not shown.


Medical dictionary. 2011.

Look at other dictionaries:

  • tricarboxylic acid cycle — tricarboxylic acid cycle. См. цикл Кребса. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • tricarboxylic acid cycle — trikarboksirūgščių ciklas statusas T sritis chemija apibrėžtis Baltymų, riebalų ir angliavandenių oksidacinio skaidymo organizme ciklas. atitikmenys: angl. citric acid cycle; Krebs cycle; tricarboxylic acid cycle rus. цикл Кребса; цикл лимонной… …   Chemijos terminų aiškinamasis žodynas

  • tricarboxylic acid cycle — Biochem. See Krebs cycle. [1940 45] * * * or Krebs cycle or citric acid cycle Last stage of the chemical processes by which living cells obtain energy from foodstuffs. Described by Hans Adolf Krebs in 1937, the reactions of the cycle have been… …   Universalium

  • tricarboxylic acid cycle — noun in all plants and animals: a series of enzymatic reactions in mitochondria involving oxidative metabolism of acetyl compounds to produce high energy phosphate compounds that are the source of cellular energy • Syn: ↑Krebs cycle, ↑Krebs… …   Useful english dictionary

  • tricarboxylic acid cycle — /traɪˌkabɒkˈsɪlɪk/ (say truy.kahbok silik) noun a cyclic system of reactions, occurring in almost all living cells, whereby pyruvic acid is metabolised to carbon dioxide, and the energy thereby liberated is trapped as chemical energy for use in… …   Australian English dictionary

  • tricarboxylic acid cycle — (= TCA cycle; citric acid cycle; Krebs cycle) The central feature of oxidative metabolism. Cyclic reactions whereby acetyl CoA is oxidized to carbon dioxide providing reducing equivalents (NADH or FADH2 ) to power the electron transport chain.… …   Dictionary of molecular biology

  • tricarboxylic acid cycle — n. Krebs cycle, citric acid cycle, sequence of chemical reactions of utmost significance in all living aerobic organisms that use oxygen as part of cellular respiration …   English contemporary dictionary

  • tricarboxylic acid cycle — (TCA) The cycle that oxidizes acetyl coenzyme A to CO2 and generates NADH and FADH2 for oxidation in the electron transport chain; the cycle also supplies carbon skeletons for biosynthesis …   Dictionary of microbiology

  • tricarboxylic acid cycle — noun Date: 1945 Krebs cycle …   New Collegiate Dictionary

  • tricarboxylic acid cycle — noun An alternative name for the Krebs cycle …   Wiktionary


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