NATURE STRUCTURAL & MOLECULAR BIOLOGY, vol. 14, no. 9, page. 847 - 853, 2007-09
GENES & DEVELOPMENT, vol. 21, no. 11, page. 1316 - 1321, 2007-06-01
JOURNAL OF BIOLOGICAL CHEMISTRY, vol. 282, no. 13, page. 9941 - 9951, 2007-03-30