1. Department of Chemistry, The University of Memphis, Memphis, Tennessee 38152, United States
2. Department of Chemistry, Mississippi State University, Mississippi State, Mississippi 39762, United States
3. Department of Chemistry & Department of Biological Sciences, Arkansas State University, Jonesboro, Arkansas 72401, United States
4. Department of Chemistry, Christian Brother University, Memphis, Tennessee 38104, United States
5. Structural Biology X-Ray Diffraction Laboratory, St. Jude Children’s Research Hospital, Memphis, Tennessee 38105, United States