Permeation and block by internal and external divalent cations of the catfish cone photoreceptor cGMP-gated channel

@article{Haynes1995PermeationAB,
  title={Permeation and block by internal and external divalent cations of the catfish cone photoreceptor cGMP-gated channel},
  author={Leroy W. Haynes},
  journal={The Journal of General Physiology},
  year={1995},
  volume={106},
  pages={507 - 523}
}
The ability of the divalent cations calcium, magnesium, and barium to permeate through the cGMP-gated channel of catfish cone outer segments was examined by measuring permeability and conductance ratios under biionic conditions and by measuring their ability to block current carried by sodium when presented on the cytoplasmic or extracellular side of the channel. Current carried by divalent cations in the absence of monovalent cations showed the typical rectification pattern observed from these… CONTINUE READING