Activation of a divalent cation-conducting channel in heart ventricle muscle cells of the snail Lymnaea stagnalis by the molluscan cardioactive peptide FMRFamide.

Abstract

Ion channels with characteristics of Ca2+ channels have been found in isolated heart ventricle cells of the snail Lymnaea stagnalis. Although spontaneous Ca2+ or Ba2+ currents were seen only occasionally, spontaneous inward Na+ currents were readily observed in the absence of patch pipette Ca2+ between membrane potentials of -100 mV and +20 mV. These… (More)

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