Ion channel-protein complexes inserted in the membrane act as molecular gates for transport across the membrane. The opening and closing of these gates can be controlled by one or more variables like ligands (small molecules, proteins, etc.), transmembrane voltage, and the concentration gradient of a chemical across the membrane. We have shown how current noise profile of voltage dependent anion channel can be used to monitor change in the gating of the channel after its modulation by various ligands. This is being proposed as a novel method to probe the interaction of ion channels with ligands. © 2005 Elsevier Inc. All rights reserved.
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