1. Department
of Chemistry, University of Sheffield, Sheffield S3 7HF, United Kingdom
2. Department
of Molecular Biology and Biotechnology, University of Sheffield, Western Bank, Sheffield S10 2TN, United Kingdom
3. Department
of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
4. Department
of Chemistry and Biochemistry, Montana State University, Bozeman, Montana 59717, United States