ATy1-copia group retrotransposon sequence in a vertebrate

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Abstract
We have used the polymerase chain reaction (PCR) to isolate a sequence characteristic of aTy1-copia group retrotransposon from the genome of the herring (Clupea harengus). This is the firstTy1-copia group retrotransposon sequence described in a vertebrate. Phylogenetic comparison of this sequence with other members of this group of retrotransposons shows that it resembles more closely some Tyl-copia group members fromDrosophila melanogaster than other group members in plants and fungi. These observations provide further evidence that theTy1-copia group LTR retrotransposons span many of the major eukaryote species boundaries, suggesting that horizontal transmission between different species has played a role in the evolution of this retrotransposon group.