Adult expression of the Drosophila Lsp-2 gene.
Previous work has demonstrated expression of the larval serum protein-2 gene, Lsp-2, uniquely during the late larval and pupal stages of development in Drosophila melanogaster. Here we report that the LSP-2 polypeptide accumulates in the hemolymph throughout adult life as well. Western blot analysis using an LSP-2 antiserum reveals notable differences in the molecular weight of the larval and adult polypeptides. Lsp-2 transcription results in a unique mRNA of 2.3 kb, exhibiting the same 5' end in both larvae and adults. However, adult Lsp-2 mRNa is only expressed at 1% of the high level detectable in late third-instar larvae. Whereas Lsp-2 mRNA accumulates uniformly in all fat body cells of third-instar larvae, over 80% of the adult Lsp-2 transcript is expressed in the adipose tissue of the head. These results suggest a differential regulation for expression of the Drosophila Lsp-2 gene in adults and larvae.[1]References
- Adult expression of the Drosophila Lsp-2 gene. Benes, H., Edmondson, R.G., Fink, P., Kejzlarová-Lepesant, J., Lepesant, J.A., Miles, J.P., Spivey, D.W. Dev. Biol. (1990) [Pubmed]
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