title: Membrane interactions between adjacent mucols secretion granules.
abstract: 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.
mesh_terms: D000818:Animals; D002462:Cell Membrane / Q000648:ultrastructure; D003594:Cytoplasmic Granules / Q000648:ultrastructure*; D005614:Freeze Fracturing; D000882:Haplorhini; D006801:Humans; D007413:Intestinal Mucosa / Q000648:ultrastructure*; D008253:Macaca mulatta; D008566:Membranes / Q000648:ultrastructure; D009093:Mucus / Q000378:metabolism*