FILE PHOTO: Arnold participates in the 2008 Milken Institute Global

FILE PHOTO: Frances Arnold, Dick and Barbara Dickinson Professor of Chemical Engineering and Biochemistry, California Institute of Technology, participates in the Investing in the Future: Accelerating the Clean-Tech Revolution panel at the 2008 Milken Institute Global Conference in Beverly Hills, California April 30, 2008. REUTERS/Phil McCarten/File Photo

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