1. Institute for Systems Biology1, Seattle, Washington 98105;
2. Departments of Molecular Biotechnology2, University of Washington, Seattle, Washington 98195;
3. Departments of Immunology3, University of Washington, Seattle, Washington 98195;
4. Departments of Bioengineering4, University of Washington, Seattle, Washington 98195;
5. Departments of Computer Science and Engineering5, University of Washington, Seattle, Washington 98195;