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. 2019 Feb 26;8:e39476. doi: 10.7554/eLife.39476

Figure 5. Bupivacaine stabilizes the closed state of TASK channels.

(a) Representative inside-out single channel recordings of TASK-3 at +140 and −140 mV before (left, black) and after (right, purple) application of 100 µM bupivacaine and (b) amplitude histogram of the events recorded at +140 mV (n = 4). (c) Change in relative open probability (NPo) by 100 µM bupivacaine. (d) Graphical illustration of the open times before and (e) after drug application (n = 4). (f) Analyses of the closed time before and (g) after application of 100 µM bupivacaine (n = 4). (h) Representative inside-out single channel recordings of TASK-3 at +140 mV before (up, black) and after (down, light pink) application of 100 mM TEA and (i) representative illustration of the open times of a TASK-3 containing patch before and after drug application. (j) Relative change in open times by 100 mM TEA (n = 3). (k) Amplitude histogram of the events recorded at +140 mV (n = 3) and (l) the respective analyses of the relative change in single channel amplitude before (black) and after (light pink) application of 100 mM TEA. Data are represented as mean ± S.E.M.. The numbers of experiments (n) are indicated within the respective bars.

Figure 5.

Figure 5—figure supplement 1. Analyses of the single channel burst characteristics of TASK-3 after application of bupivacaine.

Figure 5—figure supplement 1.

TASK-3 single channel burst kinetics analyzed after application of 100 µM bupivacaine to the cytosolic phase of inside-out patches. Data are presented as mean ± S.E.M.. The numbers of experiments (n) are indicated within the bar graphs.