1. Structural Biology Programme, Spanish National Cancer Research Centre (CNIO) , Madrid, Spain
2. Department of Macromolecular Structures, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas , Madrid, Spain
3. Molecular Interactions Facility, Centro de Investigaciones Biológicas Margarita Salas (CSIC) , Madrid, Spain
4. Department of Microbiology and Immunology, W. R. Hearst Microbiology Research Center, Weill Cornell Medicine , New York, NY, USA