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Features of the Na+-dependent pHi recovery measured with a zero Na+ pipette solution. (A) Representative experiment with 10 mM ATP in the pipette. The bar indicates the period of readmission of 155 mM Na+ solution to the bath. (B) Concentration-response relation for the effect of extracellular ethylisopropylamiloride (EIPA) on the Na+-dependent pHi recovery. (C) The effect of modifying intracellular ATP levels.
