What is citric 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.
    Synonyms: Krebs cycle, Krebs citric acid cycle, tricarboxylic acid cycle

Citric Acid Cycle

The citric acid cycle — also known as the tricarboxylic acid cycle (TCA cycle), the Krebs cycle, or the Szent-Györgyi–Krebs cycle — is a series of chemical reactions used by all aerobic organisms to generate energy through the oxidization of acetate derived from carbohydrates, fats and proteins into carbon dioxide. In addition, the cycle provides precursors including certain amino acids as well as the reducing agent NADH that is used in numerous biochemical reactions. Its central importance to many biochemical pathways suggests that it was one of the earliest established components of cellular metabolism and may have originated abiogenically.

Read more about Citric Acid Cycle.

Some articles on citric acid cycle:

Amino Acid Synthesis - Amino Acid Biosynthesis Is Regulated By Feedback Inhibition - Additional Regulation Based On Amino Acid Families - α-ketoglutarate Family
... A The α-ketoglutarate family of amino acid synthesis (synthesis of glutamate, glutamine, proline and arginine) begins with α-ketoglutarate, an intermediate in ... coli citrate synthase, the enzyme involved in the condensation reaction initiating the Citric Acid Cycle is strongly inhibited by α-ketoglutarate feedback inhibition and can be ... initial regulations of the α-ketoglutarate family of amino acid synthesis ...
Plant Respiration - Aerobic Respiration - Citric Acid Cycle
... This is also called the Krebs cycle or the tricarboxylic acid cycle ... is present, the mitochondria will undergo aerobic respiration which leads to the Krebs cycle ... the presence of oxygen, when acetyl-CoA is produced, the molecule then enters the citric acid cycle (Krebs cycle) inside the mitochondrial matrix, and gets ...
Mitochondrial Matrix - Citric Acid Cycle
... The citric acid cycle (or Krebs cycle or TCA cycle) takes place within the mitochondrial matrix ... Prior to the citric acid cycle, pyruvic acid generated from glycolysis is converted into acetyl coenzyme A (acetyl CoA) by losing a carbon dioxide molecule ... It then combines with oxaloacetic acid to form citric acid (a six-carbon molecule) to begin the citric acid cycle ...
Carbon Fixation - Other Autotrophic Pathways - Reductive Citric Acid Cycle
... The reductive citric acid cycle is the oxidative citric acid cycle run in reverse ... The reductive citric acid cycle is sometimes called the Arnon-Buchanan cycle ...

Famous quotes containing the word cycle:

    The cycle of the machine is now coming to an end. Man has learned much in the hard discipline and the shrewd, unflinching grasp of practical possibilities that the machine has provided in the last three centuries: but we can no more continue to live in the world of the machine than we could live successfully on the barren surface of the moon.
    Lewis Mumford (1895–1990)