1. School of Pharmacy and Pharmaceutical Sciences, University of Manchester, Manchester M13 9PL, U.K., Department of Biomolecular Sciences, UMIST, Manchester M60 1QD, U.K., School of Biological Sciences, University of Manchester, Manchester M13 9PT, U.K., National Science and Technology Development Agency, Rama VI Road, Bangkok 10400, Thailand, and Department of Biochemistry, Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand