1. Unit Process and Combined Circuit, PRESTO, Japan Science and Technology Corporation, Kawaguchi 332-0012, Japan
2. Department of Cell Biology, National Institute for Basic Biology, Okazaki 444-8585, Japan
3. Department of Physiology, Kansai Medical University, Moriguchi 570-8506, Japan
4. Department of Developmental Genetics, Chiba University Graduate School of Medicine, Chiba 260-8670, Japan
5. Department of Molecular Biomechanics, School of Life Science, The Graduate University for Advanced Studies, Okazaki 444-8585, Japan