1. Lilly Research Laboratories, Eli Lilly and Company, 307 E Merrill Street, Indianapolis, Indiana 46225, United States
2. Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, 635 Barnhill Drive, Indianapolis, Indiana 46202, United States
3. Department of Medicinal Chemistry and Molecular Pharmacology and Institute for Drug Discovery, Purdue University, 720 Clinic Drive, West Lafayette, Indiana 47907, United States
4. Department of Biological Sciences, Purdue University, 240 S. Martin Jischke Drive, West Lafayette, Indiana 47907, United States