1. Department
of Biotechnology, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
2. Institute for
Molecular Science, 38 Nishigo-Naka, Myodaiji, Okazaki 444-8585, Japan
3. Department
of Molecular Biology and Biotechnology, University of Sheffield, Firth Court,
Western Bank, Sheffield S10 2TN, U.K.