Compositions and methods for detecting the activity of an ion channel in a cell are described. The methods include providing a loading buffer solution to the cell, where the loading buffer includes a thallium ion indicator and optionally chloride ions, and providing a stimulus buffer that includes thallium ions to the cell. Providing the stimulus buffer can cause thallium ion influx into or efflux out of the cell through the ion channel. After providing the stimulus buffer, a change in at least one optical property of the thallium ion indicator is detected in response to thallium influx or efflux, thereby detecting the activity of the ion channel.
描述了用于检测细胞中离子通道活性的组合物和方法。这些方法包括向细胞提供负载缓冲液,其中负载缓冲液包括
铊离子指示剂和可选的
氯离子,以及向细胞提供包含
铊离子的刺激缓冲液。提供刺激缓冲液可以导致
铊离子通过离子通道流入或流出细胞。在提供刺激缓冲液之后,检测
铊离子指示剂至少一个光学性质的变化,以响应
铊离子的流入或流出,从而检测离子通道的活性。