1. Department of Pharmacology & Experimental Therapeutics , Boston University, 700 Albany St, W607, Boston, MA 02118 , USA
2. Graduate Program in Biomolecular Medicine , Boston University, 72 East Concord St, Boston, MA 02118 , USA
3. Department of Biology , Boston University, 5 Cummington Mall, Boston, MA 02215 , USA
4. Program in Molecular Biology , Cell Biology, and Biochemistry, Boston University, 5 Cummington Mall, Boston, MA 02215 , USA
5. College of Arts and Sciences , Boston University, 5 Cummington Mall, Boston, MA 02215 , USA
6. Department of Cell and Developmental Biology , University of Pennsylvania, 421 Curie Boulevard, Philadelphia, PA 19104-6058 , USA
7. Environmental Genomics & System Biology Division , Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720 , USA
8. U.S. Department of Energy Joint Genome Institute , 1 Cyclotron Road, Berkeley, CA 94720
9. School of Natural Sciences , University of California, Merced, Merced, CA , USA