Summary
Evidence is provided for the presence of retrosequences (also named retroposons) arising from Adh in the Drosophila subobscura genome. Restriction analysis and primary structure of two different retrosequence-containing clones, S812 and S135, are reported. The fact that these retrosequences lack introns and a recognizable promoter strongly supports their retrotranscriptional origin. Adjacent to the two retrosequences analyzed, a middle repetitive DNA element has been found which bears no clear similarity to any sequence reported to date in the GenBank/EMBL Data Library. A comparative analysis of these retrosequences with the functional Adh gene of D. subobscura is presented. In addition, a model concerning the origin, functionality, and propagation of these genome elements is discussed.
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Marfany, G., Gonzàlez-Duarte, R. Evidence for retrotranscription of protein-coding genes in the Drosophila subobscura genome. J Mol Evol 35, 492–501 (1992). https://doi.org/10.1007/BF00160210
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DOI: https://doi.org/10.1007/BF00160210