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Department of Chemistry, King's College London, Strand WC2R 2LS, U.K. GlaxoSmithKline, Old Powder Mills, Nr. Leigh, Tonbridge, Kent TN11 9AN, U.K. Department of ...
Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, and Department of Molecular Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston ...