Figure 3. The UTP-evoked KCa3.1 current activation involves Ca²⁺ entry and Ca²⁺-release activated Ca²⁺ (CRAC) channels.

The current was evoked by UTP in separate MLS-9 cells with Ca²⁺-free bath solution (A), or with either 50 µM 2-APB (B) or 10 µM BTP2 (C) in the bath. D. The amplitude was quantified (as in Fig. 1E) and compared with standard bath solution. The number of cells is indicated on each bar. ***p<0.001