1. Division of Chemistry I, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm17177, Sweden
2. Department of Surgical Sciences, Uppsala University, Uppsala751 85, Sweden
3. Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, Copenhagen2200, Denmark
4. Department of Pharmacological & Technological Chemistry, I.M. Sechenov First Moscow State Medical University, Moscow119146, Russia
5. The National Medical Research Center for Endocrinology, Moscow115478, Russia