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  2. Urea cycle - Wikipedia

    en.wikipedia.org/wiki/Urea_cycle

    The urea cycle converts highly toxic ammonia to urea for excretion. [1] This cycle was the first metabolic cycle to be discovered by Hans Krebs and Kurt Henseleit in 1932, [2] [3] [4] five years before the discovery of the TCA cycle. The urea cycle was described in more detail later on by Ratner and Cohen.

  3. File:Urea cycle 1.png - Wikipedia

    en.wikipedia.org/wiki/File:Urea_cycle_1.png

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  4. Metabolic pathway - Wikipedia

    en.wikipedia.org/wiki/Metabolic_pathway

    [5]: 572 To the right is an illustration of the amphibolic properties of the TCA cycle. The glyoxylate shunt pathway is an alternative to the tricarboxylic acid (TCA) cycle, for it redirects the pathway of TCA to prevent full oxidation of carbon compounds, and to preserve high energy carbon sources as future energy sources. This pathway occurs ...

  5. File:Urea-Cycle scheme 2006-01.svg - Wikipedia

    en.wikipedia.org/wiki/File:Urea-Cycle_scheme...

    Diagram of biochemical urea cycle. Uses only capital letters, no textual description. 16:16, 5 February 2006: 800 × 600 (80 KB) Ayacop: Diagram of biochemical urea cycle. Uses only capital letters, no textual description. 16:09, 5 February 2006: 800 × 600 (80 KB) Ayacop: Diagram of biochemical urea cycle. Uses only capital letters, no textual ...

  6. Category:Urea cycle - Wikipedia

    en.wikipedia.org/wiki/Category:Urea_cycle

    For more information see urea cycle. Pages in category "Urea cycle" The following 21 pages are in this category, out of 21 total.

  7. Metabolic waste - Wikipedia

    en.wikipedia.org/wiki/Metabolic_waste

    The excretion of urea is called ureotelism. Land animals, mainly amphibians and mammals, convert ammonia into urea, a process which occurs in the liver and kidney. These animals are called ureotelic. [3] Urea is a less toxic compound than ammonia; two nitrogen atoms are eliminated through it and less water is needed for its excretion.

  8. File:Urea cycle.svg - Wikipedia

    en.wikipedia.org/wiki/File:Urea_cycle.svg

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  9. Ornithine decarboxylase - Wikipedia

    en.wikipedia.org/wiki/Ornithine_decarboxylase

    The enzyme ornithine decarboxylase (EC 4.1.1.17, ODC) catalyzes the decarboxylation of ornithine (a product of the urea cycle) to form putrescine. This reaction is the committed step in polyamine synthesis. [1] In humans, this protein has 461 amino acids and forms a homodimer. [2] In humans, ornithine decarboxylase (ODC) is expressed by the ...