1. Institute of Science, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
2. Center for Scientific and Technological Equipment, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
3. Department of Low Temperature Science, National Agricultural Research Center for the Hokkaido Region, Sapporo 062-8555, Japan
4. Department of Biochemistry and Center for Protein Structure and Function, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
5. Department of Biology, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061-0406, U.S.A.