1. Department of Molecular Epigenetics, Helmholtz Center Munich and Center for Integrated Protein Science Munich (CIPSM), Germany
2. Present address: Department of Biochemistry, University of Colorado, Boulder, USA
3. Biomedical Center Munich, ZFP, Ludwig-Maximilian University Munich, Germany
4. Bioinformatic Unit, Biomedical Center Munich, Ludwig-Maximilian University Munich, Planegg-Martinsried, Germany
5. Present address: Stowers Institute for Medical Research, Kansas City, Missouri, USA