1. Department
of Biology and Konstanz Research School Chemical-Biology (KoRS-CB), University of Konstanz, Universitätsstr. 10, 78467 Konstanz, Germany
2. Department
of Systems Biology, Harvard Medical School, Boston, Massachusetts 02115, United States
3. Departments
of Molecular, Cellular, and Developmental Biology, Chemistry, and
Pharmacology, Yale University, 219 Prospect St., New Haven, Connecticut, United States