1. Department of Biochemistry and Biophysics, Texas A&M University, 300 Olsen Boulevard, College Station, Texas 77843, United States
2. Department
of Chemistry and Biophysics Program, University of Virginia, Charlottesville, Virginia 22904, United States
3. Department
of Biochemistry and Structural Biology and the X-ray Crystallography
Core Laboratory, University of Texas Health Science Center at San Antonio, San Antonio, Texas 78229, United States