1. Departamento de Química-Física Biológica, Instituto de Química-Física “Rocasolano” (IQFR), Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain
2. Research Department of Structural and Molecular Biology, University College London, London, UK
3. Institute of Structural Biology, Helmholtz Zentrum München, Neuherberg, Germany and Bavarian NMR Centre, Chemistry Department, Technical University of Munich, Garching, Germany.
4. Spectroscopy and Nuclear Magnetic Resonance Unit, Structural Biology Programme, Spanish National Cancer Research Centre, Madrid, Spain
5. Centro Nacional de Análisis Genómico (CNAG)-CRG, Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain
6. Instituto de Biología Funcional y Genómica, Consejo Superior de Investigaciones Científicas, Universidad de Salamanca, Salamanca, Spain