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“We also show that inhibition of DA release by H2O2 is mediated by sulfonylurea-sensitive K+ channels: tolbutamide blocked DA modulation by glutamate and by GABA.”
“The modulation of the acetylcholine response by GABA is blocked when the neurons are injected with EGTA to prevent a rise in intracellular Ca2+ concentration or when tolbutamide , an inhibitor of protein kinase A, is applied.”