1. Department
of Chemistry and Biochemistry and BioFrontiers Institute, University of Colorado, Boulder, Colorado 80303, United States
2. Key
Laboratory of Animal Models and Human Disease Mechanisms of Chinese
Academy of Sciences/Key Laboratory of Bioactive Peptides of Yunnan
Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China
3. Department of Chemistry & Biochemistry, Arizona State University, Tempe, Arizona 85287, United States
4. Protein & Peptide Pharmaceutical Laboratory, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China