Microdomains of high calcium concentration in a presynaptic terminal.

  title={Microdomains of high calcium concentration in a presynaptic terminal.},
  author={R R Llin{\'a}s and Mutsuyuki Sugimori and Robert B. Silver},
  volume={256 5057},
Increases in intracellular calcium concentration are required for the release of neurotransmitter from presynaptic terminals in all neurons. However, the mechanism by which calcium exerts its effect is not known. A low-sensitivity calcium-dependent photoprotein (n-aequorin-J) was injected into the presynaptic terminal of the giant squid synapse to selectively detect high calcium concentration microdomains. During transmitter release, light emission occurred at specific points or quantum… CONTINUE READING
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