By a GenomeWeb staff reporter

NEW YORK (GenomeWeb News) – Nanosphere today said that it has received a not approvable letter from the US Food and Drug Administration for its Verigene Clopidogrel Metabolism Nucleic Acid Test.

Shares of Nanosphere dropped 24 percent to $1.69 in early Tuesday trade on the Nasdaq.

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In Science this week: swapping yeast genes with human orthologs to study conservation of function, and more.

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