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In these two two-cell mouse embryos, the surface of the embryos is outlined in orange, the DNA in the nucleus is indicated in blue and the activity of the LINE-1 gene is indicated via bright red spots. Ramalho-Santos lab/UCSF hide caption

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Ramalho-Santos lab/UCSF

Some DNA Dismissed As 'Junk' Is Crucial To Embryo Development

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Yoshinori Ohsumi, a professor at the Tokyo Institute of Technology, smiles as he speaks with Japanese Prime Minister Shinzo Abe on a phone during a press conference in Tokyo today, after he was awarded the Nobel Medicine Prize. Toru Yamanaka/AFP/Getty Images hide caption

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Toru Yamanaka/AFP/Getty Images

Japanese Biologist Wins Nobel Prize In Physiology Or Medicine

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