1. Department of Chemistry, University of Bath, Bath BA2 7AY, U.K.
2. São Carlos Institute of Physics, University of São Paulo, Avenida Trabalhador São-Carlense, 400, São Carlos 13566-590, SP, Brazil
3. Departments of Microbiology & Molecular Genetics and Biochemistry & Molecular Biology, Oklahoma State University, Stillwater, Oklahoma 74078, United States
4. Department of Chemical Engineering, University of Bath, Bath BA2 7AY, U.K.