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The Journal of Cell Biology, Vol 74, 983-991, Copyright © 1977 by The Rockefeller University Press
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MR Neutra and SF Schaeffer
In primate goblet cells, the membranes of adjacent mucous granules from contact areas which appear as extensive pentalaminar fusion sites in thin sections. In freeze-fracture replicas, the same membrane areas are smooth, except for a few 6-8-nm particles which adhere to the E face. These protein-poor membrane interaction sites are relatively long- lived, and it is proposed that further stimulus may be required to trigger membrane fission.
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