Permeability of a Cell Membrane Junction
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چکیده
منابع مشابه
Permeability of a Cell Membrane Junction
The ion permeability of the membrane junctions between Chironomus salivary gland cells is strongly depressed by treatments that are generally known to inhibit energy metabolism. These treatments include prolonged cooling at 6 degrees -8 degrees C, and exposure to dinitrophenol, cyanide, oligomycin, and N-ethylmaleimide. Intracellular injection of ATP appears to prevent depression of junctional ...
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The permeability of the membrane surfaces where cells are in contact (junctional membranes) in Chironomus salivary glands depends on Ca ++ and Mg++. When the concentration of these ions at the junctional membranes is raised sufficiently, these normally highly permeable membranes seal off; their permeability falls one to three orders, as they approach the nonjunctional membranes in conductance. ...
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vitro. Arch Neurol 33: 715-721, 1976 10. Garcia JH, Kamijyo Y: Cerebral infarction: evolution of histopathological changes after occlusion of a middle cerebral artery in primates. J Neuropathol Exp Neurol 33: 408^121, 1974 11. Cammermeyer J: The importance of avoiding "dark" neurons in experimental neuropathology. Acta Neuropath 1: 245-270, 1961 12. Nicholson C, Ten Bruggencate G, Steinberg R, ...
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Gap junctions mediate the transfer of small cytoplasmic molecules between adjacent cells. A family of gap junction proteins exist that form channels with unique properties, and differ in their ability to mediate the transfer of specific molecules. Mutations in a number of individual gap junction proteins, called connexins, cause specific human diseases. Therefore, it is important to understand ...
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In many tissues cells communicate directly through arrays of intercellular channels which are organized to form gap junctions. These channels are permeant to inorganic ions as well as to small hydrophilic molecules up to Mr 2000. The electrical and chemical coupling provided by such junctions is under the control of intracellular and, in many cases, extracellular substances. The latter (hormone...
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ژورنال
عنوان ژورنال: Journal of General Physiology
سال: 1969
ISSN: 1540-7748,0022-1295
DOI: 10.1085/jgp.53.4.498