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Journal of Cell Science, Vol 7, 787-792, Copyright © 1970 by Company of Biologists

Submitted on April 13, 1970

Membrane Differentiation in the Golgi Complex of Micrasterias Denticulata Bréb. Visualized by Freeze-Etching

L. A. STAEHELIN 1 and O. KIERMAYER 2

1 The Biological Laboratories, Harvard University, Cambridge, Massachusetts 02138, U.S.A.; Department of Molecular, Cellular and Developmental Biology, University of Colorado, Boulder, Colorado 80302, U.S.A.
2 The Biological Laboratories, Harvard University, Cambridge, Massachusetts 02138, U.S.A.; Institut für Entwicklungsphysiologie, Universität zu Köln, Gyrhofstrasse 17, D-5 Köln, West Germany.

Freeze-etched dictyosomes of the alga Micrasterias denticulata (Bréb.) exhibit a gradual increase in the density of particles on the membranes of successive cisternae from the forming to the maturing face. At the maturing face a drop in particle numbers can be observed in the peripheral regions of the cisternae, where fenestration and the packaging of the secretory products takes place.

Submitted on April 13, 1970




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© The Company of Biologists Ltd 1970