1. The FIRC Institute for Molecular Oncology Foundation, Via Adamello 16, I-20139 Milan, Italy, Wellcome Trust Centre for Cell Biology, School of Biological Sciences, The University of Edinburgh, Edinburgh EH9 3JR, United Kingdom, Ciphergen Biosystems Inc., Fremont, California 94555, Bio-Rad Laboratories, c/o CEA-Saclay, Gif-sur-Yvette, France, and Polytechnic of Milano, Department of Chemistry, Materials and Chemical Engineering “Giulio Natta”, Via Mancinelli 7, Milano, Italy