1. Biology Department, University of North Carolina 1 , Chapel Hill, NC, USA
2. Department of Biochemistry and Biophysics, University of North Carolina 2 , Chapel Hill, NC, USA
3. Microbiology Program, School of Biological Sciences, Southern Illinois University 3 , Carbondale, IL, USA
4. Cell Biology and Physiology Center, National Heart, Lung, and Blood Institute, National Institutes of Health 4 , Bethesda, MD, USA
5. Department of Applied Physical Sciences, University of North Carolina 5 , Chapel Hill, NC, USA
6. Curriculum in Bioinformatics and Computational Biology, University of North Carolina 6 , Chapel Hill, NC, USA
7. Marine Biological Laboratory 7 , Woods Hole, MA, USA