World's first chimeric monkeys are born

Researchers have produced the world's first chimeric monkeys. The bodies of these monkeys, which are normal and healthy, are composed of a mixture of cells representing as many as six distinct genomes. The advance holds great potential for future research as chimeric animals had been largely restricted to mice, the researchers say. The report, published online ahead of the release of the January 20th issue of Cell, also suggests there may be limits to the use of cultured embryonic stem cells.

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