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Published online 12 December 2007 | Nature 450, 935 (2007) | doi:10.1038/450935b

News in Brief: Business

Mutual mouse

Sanofi-Aventis has struck a deal with US biotech firm Regeneron Pharmaceuticals to discover and develop therapies with a genetically engineered 'super-mouse' that can make human antibodies. Under a deal announced on 29 November, the Paris-based drugmaker will pay Regeneron, based in Tarrytown, New York, $85 million up front, and up to $475 million in research and development costs over the next 5 years.

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