Affiliation: | 1 Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA;2 Howard Hughes Medical Institute, Chevy Chase, MD 20815, USA;3 The Glenn Center for Aging Research, 10010 North Torrey Pines Road, La Jolla, CA 92037, USA;4 The Clayton Foundation Laboratories for Peptide Biology, The Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, CA 92037, USA |