1. 35) Tsukamoto, C., Kikuchi, A., Kudou, S., Harada, K., Iwasaki, T., and Okubo, K., Genetic improvement of saponin components in soybean.Food Phytochemicals for Cancer Prevention I, ACS Simposium Series 546, eds. Huang, M. T., Osawa, T., Ho, C. T., Rosen, R. T., American Chemical Society, Washington DC, pp. 372-379 (1994).
2. 37) Yoshiki, Y., Kim, H. J., Shoji, S., Hoshikawa, K., and Okubo, K., Classification of leguminous seeds by DDMP saponin composition and the chemical structures of new DDMP saponins. XVInternational Botanical Congress Abstract, Yokohama, Japan, Aug. 28-Sep. 3, pp. 399 (1993).
3. . 1996. p. 87- 100.
4. 45) Shiraiwa, M., Nakashima, H., Yamamoto, N., Tamura, T., Matsuda, S., and Okubo, K., Soybean saponin; Structures and physiological properties especially antiviral activity on HIVin vitro.Proceedings of the International Conference on Soybean Processing and Utilization, pp. 95-101 (1991).
5. 46) Okubo, K., Kudou, S., Uchida, T., Yoshiki, Y., Yoshikoshi, M., and Tonomura, M., Soybean saponin and isoflavonoids, Structure and antiviral activity against human immunodeficiency virusin vitro.Food Phytochemicals for Cancer Prevention I, ACS Symposium series 546, eds. Huang, M., Osawa, T., Ho C., and Rosen, T. R., American Chemical Society, Washington DC, pp. 330-339 (1994).