Affiliation: | (1) Faculty of Pharmaceutical Sciences, Laboratory of Molecular Biology and Biotechnology, Research Center of Medicinal Resources, Chiba University, Yayoi-cho 1-33, Inage-ku, Chiba 263-8522, Japan e-mail: ksaito@p.chiba-u.ac.jp; Fax: +81-43-290-2905, JP |