Ionic Dependence of Reversal Voltage of the Light Response in Limulus Ventral Photoreceptors

@article{Brown1974IonicDO,
  title={Ionic Dependence of Reversal Voltage of the Light Response in Limulus Ventral Photoreceptors},
  author={J. Edward Brown and Michael I. Mote},
  journal={The Journal of General Physiology},
  year={1974},
  volume={63},
  pages={337 - 350}
}
The light-induced current as measured using a voltage clamp (holding voltage at resting potential) is attenuated when sodium ions in the bathing solution, Na(o), are replaced by Tris, choline, or Li or when NaCl is replaced by sucrose. After replacement of NaCl by sucrose, the reversal voltage, V(rev), for the light response becomes more negative. In this case, the slope of the V(rev) vs. log Na(o) near Na(o) = 425 mM is approximately 55 mV/decade increase of Na(o) (mean for 13 cells). The… CONTINUE READING

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