Correspondence to:
Hiroshi HORI,
Laboratory of Molecular Genetics,
Department of Biology,
Nagoya University,
Chikusa, Nagoya 464-8602, Japan.
Telephone number +81-(0)52-789-2504;
Fax number +81-(0)52-789-2974,
E-mail address: Please join "hori" and "@bio.nagoya-u.ac.jp" when you would mail to me.
（464-8602 名古屋市千種区不老町名古屋大学大学院理学研究科生命理学専攻）