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Bullock TL, Rodríguez-Hernández A, Corigliano EM, Perona JJ.Bullock TL, et al.Proc Natl Acad Sci U S A. 2008 May 27;105(21):7428-33. doi: 10.1073/pnas.0711812105. Epub 2008 May 13.Proc Natl Acad Sci U S A. 2008.PMID: 18477696Free PMC article.