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Published online 29 August 2007 | Nature | doi:10.1038/news070827-3

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Mighty mice could yield human treatments

Super-sized animals may pave way for new drugs and bigger livestock.

It might sound like a cartoon scene from Tom and Jerry, but a biologist has come up with a real-life genetic recipe to create mice with four times more muscle than normal.

The mutant mice, created by Se-Jin Lee of Johns Hopkins University School of Medicine in Baltimore, Maryland, have two key genetic differences compared with normal mice.

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