Different roles of ribbon-associated and ribbon-free active zones in retinal bipolar cells

@article{Midorikawa2007DifferentRO,
  title={Different roles of ribbon-associated and ribbon-free active zones in retinal bipolar cells},
  author={Mitsuharu Midorikawa and Yoshihiko Tsukamoto and Ken Berglund and Masaaki Ishii and Masao Tachibana},
  journal={Nature Neuroscience},
  year={2007},
  volume={10},
  pages={1268-1276}
}
Synaptic ribbons with a halo of synaptic vesicles are seen at the active zones of sensory neurons that release transmitter tonically. Thus, ribbons are assumed to be a prerequisite for sustained exocytosis. By applying total internal reflection fluorescence microscopy to goldfish retinal bipolar cell terminals, we visualized Ca2+ entry sites, ribbons, and vesicle fusion events. Here we show that the main Ca2+ entry sites were located at ribbons, and that activation of the Ca2+ current induced… CONTINUE READING
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