Department of Computer Science and Engineering and Center for Genome Sciences and Systems Biology, Washington University. One Brookings Dr. Saint Louis, MO 63108. Contact:brent@wustl.edu.|Department of Mathematics, Washington University.|Department of Computer Science and Engineering and Center for Genome Sciences and Systems Biology, Washington University. One Brookings Dr. Saint Louis, MO 63108. Contact:brent@wustl.edu.|Department of Computer Science and Engineering and Center for Genome Sciences and Systems Biology, Washington University. One Brookings Dr. Saint Louis, MO 63108. Contact:brent@wustl.edu.