[1] SRI Int, Menlo Pk, CA 94025 USA
[2] Univ Nacl Autonoma Mexico, Ctr Ciencias Genom, Program Computat Genom, Cuernavaca 62100, Morelos, Mexico
[3] Univ Calif Los Angeles, Inst Mol Biol, Los Angeles, CA 90095 USA
[4] Univ Calif Los Angeles, Dept Microbiol Mol Genet & Immunol, Los Angeles, CA 90095 USA
[5] J Craig Venter Inst, Rockville, MD 20850 USA
[6] Macquarie Univ, Dept Chem & Biomol Sci, Sydney, NSW 2109, Australia