1. Laboratory of Quality Analysis and Assessment, Division of Agronomy and Horticultural Science, Graduate School of Agriculture, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan.
2. Lactoferrin Laboratory, Saraya Co., Ltd., 2-2-8 Yuzato, Higashisumiyoshi-ku, Osaka 546-0013, Japan.