1. Department
of Chemistry, Korea University, Seoul 136-701, Korea
2. Division
of Biotechnology, Laboratory of Stem Cells and Tissue Regeneration,
College of Life Sciences and Biotechnology, Korea University, Seoul 136-713, Korea
3. Department
of Chemistry and Research Institute of Natural Science, Gyeongsang National University, Jinju 660-701, Korea
4. Department
of Biomedical Engineering, Kyung Hee University, Yongin 446-701, Korea
5. Division
of Electron Microscopic Research, Korea Basic Science Institute (KBSI), Daejeon 305-806, Korea
6. The
Graduate School of East-West Medical Science, Kyung Hee University, Yongin 446-701, Korea