About the Authors

Hideaki Oike

oike@affrc.go.jp

Affiliation National Food Research Institute, National Agriculture and Food Research Organization, Tsukuba, Japan

Kanji Nagai

Affiliations National Food Research Institute, National Agriculture and Food Research Organization, Tsukuba, Japan, Mitsubishi Rayon Company, Ltd., Yokohama, Japan

Tatsunobu Fukushima

Affiliation Mitsubishi Rayon Company, Ltd., Yokohama, Japan

Norio Ishida

Affiliations Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan, Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan

Masuko Kobori

Affiliation National Food Research Institute, National Agriculture and Food Research Organization, Tsukuba, Japan

Competing Interests

The authors, including those employed by Mitsubishi Rayon Company Ltd, have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: HO MK. Performed the experiments: HO. Analyzed the data: KN TF NI. Contributed reagents/materials/analysis tools: KN TF NI. Wrote the paper: HO MK.