1. Buchmann Institute for Molecular Life Sciences and Institute of Biophysics, Goethe University Frankfurt, Max-von-Laue Str. 15; Frankfurt 60438 Germany
2. Departament de Bioquímica i Biologia Molecular and Institut de Biotecnologia i Biomedicina; Universitat Autònoma de Barcelona; Cerdanyola del Vallès 08193 Spain
3. Faculty of Biological Sciences & FIAS; Goethe University Frankfurt, Ruth-Moufang-Straße 1; Frankfurt 60438 Germany