1. School of Chemistry and Biochemistry, University of Western Australia, Crawley, WA6009, Australia
2. Department of Biochemistry, University of Wisconsin, Madison, WI 53726, U.S.A.
3. Department of Biological Sciences, Marquette University, P.O. Box 1881, Milwaukee, WI 53201, U.S.A.
4. Molecular Metabolism Research Group, Department of Biochemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand