1. Department of Molecular Biology, University of Wyoming, Laramie, WY 82071, USA
2. Department of Molecular, Cellular and Biomedical Sciences, University of New Hampshire, Durham, NH 03824, USA
3. Department of Chemistry, University of Wyoming, Laramie, WY 82071, USA
4. Department of Chemistry, Keene State College, Keene, NH 03435, USA
5. Department of Chemistry, University of New Hampshire, Durham, NH 03824, USA