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Editorial
Nature 446, 231-232 (15 March 2007) | doi:10.1038/446231b; Published online 14 March 2007
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The legacy of Linnaeus
Every plant and animal has a mitochondrial cytochrome oxidase I gene, and its sequence helps researchers assign that plant or animal to a given species, with some degree of certainty. The precise degree of the certainty obtained using this 'barcode' sequence is a matter of some debate, but such sequences are clearly useful to both taxonomists and those who use applied taxonomy.
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