Abstract
ANIMALS are known to excrete ammonia, urea, or uric acid as end-products of protein metabolism. So far as we can ascertain, the problem of nitrogenous excretion in arachnids needs more investigation. Since the work of Gorup-Besanez and Will1 in 1849, guanine was regarded as taking the place of uric acid as the main nitrogenous end-metabolite in arachnids. The method of synthesis of guanine in these animals is unknown2.
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References
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HAGGAG, G., FOUAD, Y. Nitrogenous Excretion in Arachnids. Nature 207, 1003–1004 (1965). https://doi.org/10.1038/2071003b0
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DOI: https://doi.org/10.1038/2071003b0
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