| Assay Method Information | |
| | Electrophysiology Assay |
| Description: | Block of Kir 1.1 (ROMKl) currents was examined by whole cell voltage clamp (Hamill et. al. Pfluegers Archives 391 : 85- 100 (1981)) using the IonWorks Quattro automated electrophysiology platform (Molecular Devices, Sunnyvale, CA). Chinese hamster ovary cells stably expressing Kirl.l channels were maintained in T-75 flasks in cell culture media in a humidified 10% CO2 incubator at 37 0C. Prior to an experiment, Kirl .l expression was induced by overnight incubation with 1 mM sodium butyrate. On the day of the experiment, cells were dissociated with 2.5 ml of Versene (Invitrogen 15040-066) for approximately 6 min at 37 0C and suspended in 10 ml of bath solution containing (in roM): 150 NaCl, 10 KCl, 2.7 CaCl2, 0.5 MgCl2, 5 HEPES5 pH 7.4. After centrifugation, the cell pellet was resuspended in approximately 4.0 ml of bath solution and placed in the Ion Works instrument. The intracellular solution consisted of (in mM): 80 K gluconate, 40 KCl, 20 KF5 3.2 MgCl2, 3 EGTA, 5 Hepes, pH 7.4. |
| Affinity data for this assay | |
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