| one publication added to basket [67706] | Sur la signification évolutive de la synthèse de l'urée, de l'acide urique et de la quanine
In: Cahiers de Biologie Marine. Station Biologique de Roscoff: Paris. ISSN 0007-9723; e-ISSN 2262-3094, more
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| Abstract |
Urea synthesis is the evolutionary response to the passage of aquatic to terrestrial life. It is therefore reasonable to assume that urea as osmotic effector in elasmobranch fishes is a secondary adaptation the meaning of which from the standpoint of energy metabolism is discussed. This situation is compared to that of the arthropods and more specifically to that of Crustacea where amino acids are osmotic effectors quantitatively the most important. Indeed 4M ATP are required to synthetize 1M of urea, while a mean of 30 ATP are necessary for the synthesis of 1M of amino acids. |
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