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Molecular characterization of the zerknüllt region of the Antennapedia complex of D. subobscura

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Abstract

We have characterized at the molecular level the zerknüllt (zen) region of the Drosophila subobscura Antennapedia complex. The sequence comparison between D. subobscura and D. melanogaster shows an irregular distribution of the conserved and diverged regions, with the homeobox and a putative activating domain completely conserved. Comparisons of the promoter sequence and pattern of expression of the gene during development suggest that the regulation of zen has been conserved during evolution. The conservation of zen expression in a subpopulation of the polar cells indicates the existence of an important role in such cells. We describe a transitory segmented pattern of expression of zen in both species, suggesting the existence of interactions with a pair rule gene. Some indirect clues indicate that the z2 gene might be absent from the D. subobscura genome. A chromosome walk initiated to reach the proboscipedia gene of D. subobscura reveals that the distance between pb and zen is at least four times the one described for D. melanogaster and for D. pseudoobscura. Finally, we present cytological evidence showing that the ANT-C is inverted in D. subobscura as compared to D. melanogaster.

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Authors and Affiliations

  1. Department of Biochemistry, Imperial College, SW7 2AZ, London, UK

    Javier Terol

  2. Department of Genetics, Universitat de Valencia, Dr. Moliner 50, E-46100, Burjassot (Valencia), Spain

    Manuel Perez-Alonso & Rosa de Frutos

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  1. Javier Terol
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  2. Manuel Perez-Alonso
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  3. Rosa de Frutos
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Terol, J., Perez-Alonso, M. & de Frutos, R. Molecular characterization of the zerknüllt region of the Antennapedia complex of D. subobscura . Chromosoma 103, 613–624 (1995). https://doi.org/10.1007/BF00357688

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  • DOI: https://doi.org/10.1007/BF00357688

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