Abstract

The binding of γ-aminobutyric acid (GABA) to synaptosomal fractions of the rat cerebellar cortex has been examined at 0–4°C in the presence and absence of bicuculline, chlorpromazine, and/or Na +. A GABA-binding component has been demonstrated in the synaptosomal fraction which is competitively inhibited by bicuculline. In addition, this binding component persists in the absence of Na + and in the presence of chlorpromazine. It seems likely that this binding component is the post-synaptic binding site or “receptor” of GABA.

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