1. Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan
2. Fish Protein Laboratory, Suzuhiro Kamaboko Honten Co., Ltd., Odawara, Kanagawa 250-0862, Japan
3. School of Marine Biosciences, Kitasato University, Sagamihara, Kanagawa 252-0373, Japan