1. Signalling Programme, The Babraham Institute, Cambridge CB22 3AT, United Kingdom
2. Mass Spectrometry Facility, The Babraham Institute, Cambridge CB22 3AT, United Kingdom
3. Proteomics STP, The Francis Crick Institute, London NW1 1AT, United Kingdom
4. GlaxoSmithKline, Gunnels Wood Road, Stevenage SG1 2NY, Hertfordshire, United Kingdom
5. Medical Research Council London Institute of Medical Sciences, Imperial College London, Hammersmith Hospital, London W12 0NN, United Kingdom