The ion selectivity of a membrane conductance inactivated by extracellular calcium in Xenopus oocytes.

@article{Zhang1998TheIS,
  title={The ion selectivity of a membrane conductance inactivated by extracellular calcium in Xenopus oocytes.},
  author={Yuhong Zhang and Don W. McBride and Owen P. Hamill},
  journal={The Journal of physiology},
  year={1998},
  volume={508 ( Pt 3)},
  pages={763-76}
}
1. The ion selectivity of a membrane ion conductance that is inactivated by extracellular calcium (Ca2+o) in Xenopus oocytes has been studied using the voltage-clamp technique. 2. The reversal potential of the Ca2+o-sensitive current (Ic) was measured using voltage ramps (-80 to +40 mV) as a function of the external concentration (12-240 mM) of NaCl or KCl. The direction and amplitude of the shifts in reversal potentials are consistent with permeability ratios of 1:0.99:0.24 for K+:Na+:Cl-. 3… CONTINUE READING