From the Center for Tsukuba Advanced Research Alliance and Institute of Basic Medical Sciences, University of Tsukuba, Tsukuba, Japan; Department of Biochemistry, Tohoku University School of Medicine, 2-1 Seiryocho, Aoba-ku, Sendai, Japan; and Department of Biochemistry, Molecular Biology and Cell Biology, Northwestern University, Evanston IL.(1999-06-15時点)
