1. Biosciences Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA
2. Environmental Sciences Division and Climate Change Science Institute Oak Ridge National Laboratory Oak Ridge TN 37831 USA
3. Department of Energy Joint Genome Institute Walnut Creek CA 94598 USA
4. HudsonAlpha Institute of Biotechnology Huntsville AL 35806 USA
5. Department of Biology Duke University Durham NC 27708 USA