西亚试剂：Biohackers gear up for genome editing

A complete lack of formal scientific training has not kept Johan Sosa from dabbling with one of the most powerful molecular-biology tools to come along in decades.

Sosa has already used CRISPR, a three-year-old technology that makes targeted modifications to DNA, in test-tube experiments. Next week, he hopes to try the method in yeast and, later, in the model plant Arabidopsis thaliana.

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Hailed for its simplicity and versatility, CRISPR allows scientists to make specific changes to a gene’s sequence more easily than ever before. Researchers have used CRISPR to edit genes in everything from bacteria to human embryos; the technique holds the potential to erase genetic defects from family pedigrees plagued by inherited disease, treat cancer in unprecedented ways or grow human organs in pigs. One researcher has even proposed modifying the elephant genome to produce a cold-adapted replica of the long-extinct woolly mammoth.

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