Institution: | (1) Department of Molecular, Cellular and Developmental Biology, University of Colorado at Boulder, 80309-0347 Boulder, CO, USA;(2) Present address: Department of Genetics, University of California, 94720 Berkeley, CA, USA;(3) Present address: Department of Microbiology, University of California, 405 Hilgard Avenue, 90024 Los Angeles, CA, USA |