1. T. Tsukihara, H. Aoyama, E. Yamashita, T. Tomizaki, H. Yamaguchi are at the Institute for Protein Research, Osaka University, 3-2 Yamada-oka, Suita 565, Japan.
2. K. Shinzawa-Itoh, R. Nakashima, R. Yaono, S. Yoshikawa are at the Department of Life Science, Himeji Institute of Technology, Kamigohri Akoh, Hyogo 678-12, Japan.