Effect of tryptophan metabolites on fluorescent granules in the Malpighian tubules of eye color mutants of Drosophila melanogaster.

Abstract excerpt

Fluorescent granules that are stained with Nile blue sulfate are present in larval Malpighian tubules in the wild type strain of Drosophila melanogaster, Oregon-R. These granules emit a weak blue fluorescence and most of them are about 2 microns or more in diameter. The ommochrome precursor 3-hydroxy-kynurenine (3-HK) is actively transferred into the tubules of Oregon-R. Changes in the fluorescent granules in the...

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