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Fig. 2. Changes in pHi in isolated toad myocytes subjected to
hypercapnic acidosis in the absence or presence of
Na+/H+ exchanger (NHE) inhibition. (A) In the the
absence of cariporide, the initial fall in pHi was followed by
restitution towards the 5% CO2 values, in spite of the persistent
extracellular acidosis. No pHi recovery was observed in the
presence of cariporide (5 µmol l1). (B) Overall results
of five experiments of this type. *P<0.05 with respect to values
with cariporide.