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Published online 15 May 2002 | Nature | doi:10.1038/news020513-5

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Gene marks clones for death

Vetting clones for one abnormal gene could boost success rate.

One gene could explain up to 90% of failed clones, say US researchers. Using the gene's activity to screen out flawed embryos could raise the technique's low success rate, they hope, but may not resolve clones' health problems.

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