The role of Ca2+ as a trigger for the membrane fusion
Manfred Gratzl, Roland Ekerdt, Gerhard Dahl
Abstract
Manfred Gratzl, Roland Ekerdt, Gerhard Dahl
Abstract
As revealed by freeze-fracturing, secretory vesicles isolated from pancreatic islet cells fuse when incubated with low concentration of Ca2+. The properties of this process are described and were found to be similar to those investigated with isolated secretory vesicles from different tissue origin. Secretory vesicle fusion is compared mainly with the ionic requirements of insulin secretion by the pancreatic B-cells and exocytosis by other secretory cells.
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As revealed by freeze-fracturing, secretory vesicles isolated from pancreatic islet cells fuse when incubated with low concentration of Ca2+. The properties of this process are described and were found to be similar to those investigated with isolated secretory vesicles from different tissue origin. Secretory vesicle fusion is compared mainly with the ionic requirements of insulin secretion by the pancreatic B-cells and exocytosis by other secretory cells.
Key concepts: Exocytosis, Secretory Vesicle, Vesicle, Secretion, Cell biology, Secretory pathway, Vesicle fusion, Pancreatic islets