Drosophila melanogaster lacks eye-pigment binding proteins

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Abstract
D. melanogaster contains no detectable eye-pigment binding proteins, and the previous evidence for the presence of such proteins in the cecropia moth [Hyalophora cecropia] is probably not valid. The major brown pigment of Drosophila (and of cecropia), dihydroxanthommatin, behaves as a high MW compound in Sephadex chromatography, thus leading to false conclusions.