Institution: | aMedical Research Council Protein Phosphorylation Unit and;cThe Scottish Institute for Cell Signaling, College of Life Sciences, Sir James Black Centre, University of Dundee, Dundee, DD1 5EH, United Kingdom;;bDepartment of Biological Chemistry and Molecular Pharmacology, Dana–Farber Cancer Institute, Harvard Medical School, Boston, MA, 02115; and;dMedical Research Council Technology, London NW7 1AD, United Kingdom |