1. Present address: Jet Propulsion Laboratory, NASA Biotechnology and Planetary Protection Group, Pasadena, California
2. Evolutionary Genomics Program, DOE Joint Genome Institute, Walnut Creek, California
3. Present address: Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California
4. Present address: Genomic Technologies Program, DOE Joint Genome Institute, Walnut Creek, California
5. Present address: Phylogenomics Program, DOE Joint Genome Institute, Walnut Creek, California
6. Department of Ecology & Evolutionary Biology, The University of Arizona
7. Department of Biochemistry and Molecular Biophysics, The University of Arizona
8. Present address: Unitat Mixta d'Investigació en Genòmica i Salut Centre Superior d'Investigació en Salut Pública/UVEG-Institut Cavanilles, Valencia, Spain and School of Natural Sciences, University of California Merced