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Zusammenfassung:
We describe the localization of sites for choline uptake in the brain of Drosophila melanogaster by the technique of autoradiography of diffusible substances. After systemic injection of [3H]choline, heavy labelling is found in certain regions of the ventral mid-brain, the antennal mechanosensory system including certain commissures, the olfactory lobes and the antennal glomerular tract. This accumulation of label is sensitive to hemicholinium-3 and can be suppressed by incubation at 0°C. It is proposed that acetylcholine is a major neurotransmitter of the antennal mechanosensory and chemosensory systems of Drosophila.
