Nitrogen Excretion in Cockroaches: Uric Acid Is Not a Major Product

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Science  25 Aug 1972:
Vol. 177, Issue 4050, pp. 699-701
DOI: 10.1126/science.177.4050.699


Thin-layer chromatographic and enzymatic spectrophotometric analyses have failed to detect uric acid in fecal extracts from American cockroaches on specified diets. Uric acid appears in the excreta when it is a dietary constituent, although most of it is apparently absorbed and stored internally. Surprisingly, ammonia is a major excretory product.