1. Department of Molecular Biology, Max Planck Institute of Biochemistry Am Klopferspitz 18a 82152 Martinsried Germany
2. Center for Genomic Regulation (CRG) Passeig Maritim 37–49 08003 Barcelona Spain
3. ICREA Spain
4. Peptide Biochemistry Research Group of the Hungarian Academy of Science, Department of Medical Chemistry, Semmelweis University Puskin u. 9 Budapest 1088 Hungary