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Calcium Influx in Active Aplysia Neurones detected by Injected Aequorin

Abstract

ACTION potentials may be recorded in Aplysia1,2 and Helix3 neurones in sodium and in calcium-free solutions, provided that either ion is present in the medium. The inward current may be due to both, calcium and sodium ions. To test this directly, the calcium activated photoprotein aequorin4–7 was used as it has been for the barnacle muscle fibre8,9, the squid giant axon10 and recently for the squid giant synapse11.

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STINNAKRE, J., TAUC, L. Calcium Influx in Active Aplysia Neurones detected by Injected Aequorin. Nature New Biology 242, 113–115 (1973). https://doi.org/10.1038/newbio242113b0

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