Affiliation: | (1) Yamanouchi Pharmaceutical Co., Ltd., 1-8 Azusawa 1-chome Itabashi-ku, 174 Tokyo, Japan;(2) Department of Cell Biology, The Rockefeller University, 10021 New Yorks, NY, USA;(3) Present address: Centro Investigación sobre Ingenieria Genetíca y Biotechnología, UNAM, P.O. Box 70479, 04510 Mexico, DF, Mexico |