1. Department of Microbiology and Immunology; Teikyo University School of Medicine; Itabashi-ku Tokyo 173-8605 Japan
2. Research Center for Medical Mycology; Teikyo University; Hachioji Tokyo 192-0395 Japan
3. Biotechnology Research Laboratories; Takara Shuzo Co. Ltd.; Otsu Shiga 520-2193 Japan