1Department of Chemistry and Biochemistry and W.M. Keck Foundation Center for Molecular Structure, California State University Fullerton, Fullerton, CA 92834-6866, USA Email: [email protected]
2Department of Mathematics, California State University Fullerton, Fullerton, CA 92834-6866, USA
3Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX 77843-2128, USA and Biology and Biotechnology Research Program, L-448, Lawrence Livermore National Laboratory, Livermore, CA 94551, USA
Accepted on July 14, 2004; Advance Access publication August 18, 2004
