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Updated: Jun 25, 2026

Site Directed Spin Labeling and EPR Spectroscopic Studies of Pentameric Ligand-Gated Ion Channels
Published on: July 4, 2016
Structure-activity relationships in linear oligoester ion-channels
Thomas Murray Fyles1, Horace Luong
1Department of Chemistry, University of Victoria, PO Box 3066, Victoria, BC, CanadaV8W 3V6. tmf@uvic.ca
Abstract:
The ion transport activity of eighteen linear oligoesters was assessed using a quantitative fluorescence assay to monitor the collapse of a pH gradient across a vesicle bilayer membrane. Significant activity was associated with compounds that have extended lengths comparable to the thickness of the bilayer membrane, and with the most hydrophilic members of the compounds surveyed. Substantial differences in activity between constitutional isomers were also observed. The aggregation of active compounds in aqueous solution was detected by a pyrene fluorescence probe, and subsequently detected as a rate-limiting step in a sequential vesicle experiment.
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