
US scientist Roger Tsien, from the University of California San Diego and joint Nobel Prize winner in Chemistry 2008 is pictured in this undated publicity photo released to Reuters October 8, 2008. Japanese researcher Osamu Shimomura and Americans Roger Tsien and Martin Chalfie were jointly awarded the 2008 Nobel Prize for Chemistry October 8, 2008. They won "for the discovery and development of the green fluorescent protein, GFP". [Agencies]
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