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Article: [CI.sup.-] and [Glutamate.sup.-] competition for a volume-regulated anion channel.

Article from:
The Biological Bulletin
Article date:
October 1, 2002
Author:
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Volume-regulated anion currents are ubiquitous and contribute to volume recovery in response to cell swelling under hypotonic conditions. Glutamate ([Glut.sup.-]) and other amino acids are involved in volume regulatory processes (e.g., 1-5), and one pathway for volume-regulated amino acid release is through a volume-regulated anion conductance (6, 7). [Glut.sup.-], unlike many other volume-sensitive amino acids, is negatively charged at physiological pH; and [Glut.sup.-] current may therefore be measured using whole cell patch clamp recording (3). This study addresses the relative permeability of [Glut.sup.-] and [Cl.sup.-] through a volume-regulated anion conductance in ...

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