1. 1Division of Cell and Developmental Biology, University of Dundee, Dundee DD1 5EH, Scotland, U.K.
2. 2Division of Cell Signalling and Immunology, University of Dundee, Dundee DD1 5EH, Scotland, U.K.
3. 3MRC Protein Phosphorylation and Ubiquitylation Unit, School of Life Sciences, University of Dundee, Dundee DD1 5EH, Scotland, U.K.
4. 4Division of Cancer Studies, King's College London, New Hunts House, Guy's Campus, London SE1 1UL, U.K.