Parasites or not? Transposable elements in fruit flies

The problem of parasitism occurs at all levels right down to the DNA scale. Genomes may contain up to 80 percent "foreign" DNA but details of the mechanisms by which this enters the host genome and how hosts attempt to combat its spread are still the subject of conjecture. Important new information comes from the group of Christian Schlotterer at the University of Veterinary Medicine, Vienna. The findings are published in the prestigious journal PLoS Genetics.

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