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Figure 5


Fig. 5. The effect of uncaging GTP-{gamma}-S on cytosolic Na+. (A) Recording of intracellular Na+ and membrane potential before and after uncaging GTP-{gamma}-S by a UV pulse. (B–D) Steady-state cytosolic Na+ concentration before (control) and during uncaging GTP-{gamma}-S (B), before (control) and after a UV pulse on non-injected cells (C), and in the absence (control) and presence of cyclopiazonic acid (CPA, 20 µmol l–1), before (control) and after uncaging GTP-{gamma}-S in the presence of CPA (D). **P<0.01.





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