Molecular Biology and Evolution 17:467-468 (2000)
© 2000 Society for Molecular Biology and Evolution
Letter to the Editor |
Codon Usage and the Origin of P Elements


*Laboratoire Populations, Génétique et Evolution, Centre National de la Recherche Scientifique, Gif/Yvette, France;
and
Laboratoire Biométrie et Biologie Évolutive, Centre National de la Recherche Scientifique, Université de Lyon I, Villeurbanne, France
The authors of a recent comparison of the P transposable element and three genes of Drosophila melanogaster and Drosophila willistoni suggested that the codon usage of the D. melanogaster P element is similar to that of D. willistoni genes (Powell and Gleason 1996
). They concluded that this could be further evidence of the recent horizontal transfer of the P element from D. willistoni to D. melanogaster indicated by several previous findings (Clark and Kidwell 1997
). More specifically, it was shown that D. willistoni genes tend to be T-ending-codon genes, whereas those of D. melanogaster tend to be C-ending-codon genes. The
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