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ornithine
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ornithine

amino acid

Learn about this topic in these articles:

metabolism

  • mitochondria and cellular respiration
    In metabolism: Disposal of nitrogen

    …phosphate (NH2CO―) is transferred to ornithine, an amino acid, in a reaction catalyzed by ornithine transcarbamoylase; the products are citrulline and inorganic phosphate [31]. Citrulline and aspartate formed from amino acids via step [26b] react to form argininosuccinate [32]; argininosuccinic acid synthetase catalyzes the reaction. Argininosuccinate splits into

    Read More
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lysine
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lysine

chemical compound
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amino acid
cystinuria

lysine, an amino acid released in the hydrolysis of many common proteins but present in small amounts or lacking in certain plant proteins; e.g., gliadin from wheat, zein from corn (maize). First isolated from casein (1889), lysine is one of several so-called essential amino acids for warm-blooded animals; i.e., they cannot synthesize it and require dietary sources. (It is formed in plants, algae, and fungi by two distinct biosynthetic pathways.) Human populations dependent on grains as a sole source of dietary protein suffer from lysine deficiency. The chemical structure of lysine islysine, chemical compound

This article was most recently revised and updated by Erik Gregersen.
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