1. Department of Biochemistry and Molecular Biology, Department of Chemistry, Institute for Biophysical Dynamics, The University of Chicago, Chicago, IL 60637 (USA)
2. Present address: Department of Chemistry, Graduate School of Science, Osaka University, 1‐1, Toyonaka, Osaka 5600043 (Japan)
3. Center for Immunology and Inflammatory Diseases, Division of Rheumatology, Allergy and Immunology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114 (USA)
4. Department of Chemistry, Graduate School of Science, Osaka University, 1‐1, Toyonaka, Osaka, 5600043 (Japan)