1. Instituto de Catálisis, CSIC, Marie Curie 2, Cantoblanco, 28049 Madrid, Spain
2. Bioenergetique et Ingenerie des Proteins, Institute de Biologie Structurale et Microbiologie, CNRS, Chemin Joseph Aiguier, 13402 Marseille, Cedex 20, France
3. King's College London, Pharmaceutical Sciences Research Division, Franklin-Wilkins Building, 150, Stamford Street, London SE1 9NH, U.K.