Affiliation: | From the ‡Department of Oral Biology, Brain Korea 21 Project, Oral Science Research Center, Center for Natural Defense System, Yonsei University College of Dentistry, Seoul 120-752, Korea, ;the §Division of Molecular Life Sciences and the Center for Cell Signaling Research, Ewha Womans University, Seoul 120-750, Korea, and ;the ¶Department of Physiology, University of Texas Southwestern Medical Center, Dallas, Texas 75390-9040 |