Na(+)-HCO3- symport in the sheep cardiac Purkinje fibre.


1. Intracellular pH (pHi) was recorded in isolated sheep cardiac Purkinje fibres using liquid sensor ion-selective microelectrodes in conjunction with conventional (3 M-KCl) microelectrodes (to record membrane potential). 2. In HEPES-buffered solution (pH0 7.4), pHi recovery from an intracellular acid load (20 mM-NH4Cl removal) was blocked by 1 mM-amiloride… (More)


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