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Transport of Cesium Ion Across a Bilayer Lipid Membrane and Its Facilitation in the Presence of Iodide Ion
Author(s) -
Shirai Osamu,
Ohnuki Toshihiko,
Kitazumi Yuki,
Kano Kenji
Publication year - 2013
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201300148
Subject(s) - ion transporter , chemistry , ion , lipid bilayer , membrane , iodide , bilayer , caesium , aqueous solution , biophysics , analytical chemistry (journal) , inorganic chemistry , chromatography , biochemistry , organic chemistry , biology
The ion transport current was clearly observed across a bilayer lipid membrane (BLM) between two aqueous phases (W1, W2) containing 0.1 M CsCl. This indicates that Cs + can spontaneously penetrate the BLM in the absence of any kind of transporter. In addition, the current density at a given potential between W1 and W2 increased using I − instead of Cl − as the counter ion. Our results strongly suggest that the cell membrane transport is partially responsible for the internal exposure of 134 Cs and 137 Cs.