1. Food Function Laboratory, School of Agriculture, Ibaraki University, Ami 300-0393, Japan, Health Technology Research Center (HTRC), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba West, 16-1 Onogawa, Tsukuba 305-8569, Japan, Research Laboratory for Agricultural Biotechnology and Biochemistry (RLABB), Kathmandu, Nepal, Protein Network Research Center, Yonsei University, Seoul 120-749, Korea, HTRC, AIST Kansai Center, 1-8-31 Midorigaoka, Ikeda 563-8577, Japan