Sadaaki Iwanaga and Shun-ichiro Kawabata

Department of Biology, Faculty of Science, Kyushu University, Fukuoka 812-8581, Japan

Received 7/13/98 Accepted 8/21/98

5. ACKNOWLEDGMENTS

This work was supported by Grants-in-Aid for Scientific Research from the Ministry of Education, Science, Sports and Culture of Japan. We thank Drs. Kei-ichi Kuma and Takashi Miyata of Kyoto University for useful advice.