1. Department of Chemistry and Biochemistry, Florida International University, Miami, FL 33199, USA
2. Biomolecular Sciences Institute, Florida International University, 11200 SW 8 St, Miami, FL 33199, USA
3. Structural Biology Center, X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 S. Cass Avenue, Lemont, IL 60439, USA
4. X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 S. Cass Avenue, Lemont, IL 60439, USA