Affiliation: | (1) Marine Biotechnology Center and Department of Molecular, Cellular and Developmental Biology University of California, 93106 Santa Barbara, CA, USA;(2) Present address: Department of Zoology, University of Queensland, Q 4072 Brisbane, Australia;(3) Present address: Department of Cell Biology, Klingelbergstrasse 70, CH-4056 Biozentrum, Basel, Switzerland |