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Abstract
Properties of melanins depend strongly on their chemical constitution. Melanins from differently colored strains of Drosophila melanogaster demonstrate various proprieties, and biological activity in the presence of toxic ions or radiation. In the presented work, we analyzed chemical constitution of the melanins derived from black, gray and yellow D. melanogaster strains. Analysis of the products forming during thermal degradation of the biopolymers by pyrolitic gas chromatography followed by mass spectrometry allowed us to determine chemical composition of these biopolymers and classified melanins derived from black and gray strains as eumelanins and derived from yellow strains as pheomelanins. These findings allow us to determine chemical and biological properties of the melanins in vivo, and can explain susceptibility of differently colored strains of D. melanogaster to metal ions.
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