1. Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322-0300, USA
2. Science for Life Laboratory, Department of Chemistry – BMC, Uppsala University, BMC, Box 576, S-751 23 Uppsala, Sweden
3. Departamento de Química, ICEX, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, 31270-901, Brazil
4. Department of Chemistry, Yale University, 225 Prospect Street, New Haven, CT 06520, USA
5. Department of Molecular Biophysics and Biochemistry, Yale University, 266 Whitney Avenue, New Haven, CT 06520, USA
6. School of Chemistry and Biochemistry, Georgia Institute of Technology, 901 Atlantic Drive NW, Atlanta, GA 30332-0400, USA