1. Division of Life Sciences, University of Incheon, Incheon 406-840, Korea.
2. Mushroom Division, National Institute of Horticultural and Herbal Science, Rural Development Administration, Suwon 441-707, Korea.
3. Department of Life Science, University of Seoul, Seoul 130-743, Korea.
4. Department of Biology, Dongguk University, Seoul 100-715, Korea.