Affiliation: | (1) ICSN-RMN, Ecole-Polytechnique (équipe CNRS), Palaiseau, 91128, France;(2) Present address: Institut Européen de Chimie et Biologie, Pessac, 33607, France;(3) Present address: Center for Molecular Genetics, University of California, San Diego, La Jolla, CA 92093-0634, USA |