Figure 5.

Lack of effect of CLT on [Ca²⁺]_i in HEK 293 cells. Representative continuous recording of [Ca²⁺]_i (expressed as the uncalibrated 340 nm/380 nm ratio) in a field of HEK 293 cells stably expressing the L-type Ca²⁺ channel α_1C subunit. For the periods indicated by the horizontal bars, the cells were exposed to a perfusate containing either 100 mmol l⁻¹ K⁺, or 10 μmol l⁻¹ clotrimazole, as indicated. This example is representative of six such recordings.