Der Gehalt an freiem Tryptophan und Kynurenin bei den Genotypen a+ und a von Ephestia kühniella während der Entwicklung

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Abstract
The content of free tryptophane and kynurenine during developement was investigated by fluorimetric determination of substances isolated by paper chromatography. In contrast to previous investigations more free tryptophane was found in every stage in the red-eyed mutant a than in the wild form. The concentration is high in the-eggs, low in the larvae and reaches a new maximum in the pupae. In the a imago it is stored principally in the ovaries and in the excretion. Free tryptophane is present also in the hemolymph of a. larvae and imagines in many times higher concentration than in the wild form. The kynurenine content rises steeply to a maximum in the early a+ pupae (about the 3rd day) and falls off again as abruptly.

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