1. Max Planck Institute of Molecular Cell Biology and Genetics, 01307 Dresden, Germany.
2. Max Planck Institute for the Physics of Complex Systems, 01187 Dresden, Germany.
3. Center for Systems Biology Dresden, 01307 Dresden, Germany.
4. Department of Evolution, Ecology, and Organismal Biology, University of California, Riverside, CA 92521, USA.
5. Division of Vertebrate Zoology and Sackler Institute for Comparative Genomics, American Museum of Natural History, New York, NY 10024, USA.