Degradation of purines in primates leads to the formation of what major excreted product?

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Primates and some other animals lack the enzyme uricase, which converts uric acid to a more soluble compound, and therefore excrete the more insoluble uric acid. Allantoin is the major excreted product of purine degradation in most mammals, but not in primates. Ammonia and urea are excreted primarily by the kidney as a result of protein degradation, not purine degradation. Hypoxanthine is an intermediate in the degradation of purines, but it is not a major excreted product.

Degradation of Purines in Primates Leads to the Formation of What