1. Biological Systems and Engineering Division Lawrence Berkeley National Laboratory Berkeley CA, 94720 USA
2. Department of Comparative Biochemistry University of California Berkeley CA, 94720 USA
3. Biochemistry and Molecular Microbiology & Immunology Department University of Missouri Columbia MO, 65211 USA
4. Environmental Genomics and Systems Biology Division Lawrence Berkeley National Laboratory Berkeley CA, 94720 USA
5. Department of Energy, Knowledge Base Lawrence Berkeley National Laboratory Berkeley CA, 94720 USA