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| | Electrophysiology Assay |
| Description: | Manual Electrophysiology: On the day of experimentation, the 35 mm dish is placed on the stage of an inverted microscope equipped with a perfusion system that continuously perfuses the culture dish with fresh recording media. A gravity driven superfusion system is used to apply test solutions directly to the cell under evaluation. This shooter system consists of an array of glass pipettes connected to a motorized horizontal translator. The outlet of the shooter is positioned approximately 100 μm from the cell of interest.Whole cell currents are recorded using the whole-cell patch clamp configuration using an Axopatch 200B amplifier (Axon Instruments, Foster City Calif.), 1322A A/D converter (Axon Instruments) and pClamp software (v. 8; Axon Instruments) and stored on a personal computer. Gigaseals am formed and the whole-cell configuration is established in voltage clamp mode, and membrane currents generated by hNav1.7 channels are recorded. Borosilicate glass pipettes with resistance values between 1.5 and 2.0 MΩ when filled with pipette solution are used and series resistance (<5 MΩ) is compensated by 75-80%. Signals are sampled at 50 kHz and low pass filtered at 3 kHz. |
| Affinity data for this assay | |
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