1. Department of Biochemistry and Molecular Biology, Nippon Medical School, Sendagi, Tokyo 113-8602, Japan
2. Department of Veterinary
Clinical Medicine, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
3. Department of Biochemistry, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
4. Japan Synchrotron Radiation Research Institute (SPring-8/JASRI), Sayo, Hyogo 679-5198, Japan