作者单位:Structural Biology and Biophysics, Pfizer La Jolla Laboratories, San Diego, CA 92121, United States[1]Cardiovascular Metabolic and Endocrine Disease Research, Pfizer Groton Laboratories, Groton, CT[2]Structural Biology and Biophysics, Pfizer Groton Laboratories, Eastern Point Rd, Groton, CT 06340[3]