1. Department of Chemistry and Physics, Ivory V. Nelson Science Center, Lincoln University, Lincoln University, Pennsylvania 19352, United States
2. Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, 422 Curie Blvd, Philadelphia, Pennsylvania 19104, United States
3. Price Family Foundation Institute of Structural Biology and Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73019, United States
4. University of Oklahoma College of Medicine, 800 Stanton L. Young Blvd, Oklahoma City, Oklahoma 73117, United States
5. Department of Chemistry and Biochemistry, San Diego State University, 5500 Campanile Drive, San Diego, California 92182, United States