Abstract
[3H]-tetracaine binding was studied in a rat synaptosomal preparation. [3H]-tetracaine bound to a single class of binding sites with a mean KD of 188 +/- 28 nM and a mean maximal binding capacity of 13 +/- 0.7 pmol mg-1 protein. [3H]-tetracaine binding was inhibited by tetracaine, procaine and by beta-adrenoceptor blocking agents which possess local anaesthetic properties. [3H]-tetracaine binding was not modified by neurotoxins interacting specifically with the sodium channels.
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