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The involvement of a GTP-binding protein (G-protein) in the process of neurotransmitter release was examined using pertussis toxin and cholera toxin. Cholinergic agonists are shown to mediate [3H]noradrenaline release in rat brain slices via a pertussis toxin (1.2 micrograms/ml) sensitive, and cholera toxin (0.5 microgram/ml) insensitive G-protein. An(More)
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