Yoko Satta, Yi-Ju Li and Naoyuki Takahata

Department of Biosystems Science, The Graduate University for Advanced Studies, Hayama, Kanagawa 240-0193, Japan

Received 4/3/98 Accepted 4/7/98

Send correspondence to:

Dr. Naoyuki Takahata
Department of Biosystems Science
The Graduate University for Advanced Studies
Hayama, Kanagawa 240-0193, Japan

Tel: +81 468 58 1504,
Fax: +81 468 58 1542,

E-mail: takahata@soken.ac.jp