Abstract
Localization in the nervous system of Drosophila melanogaster of a cloned Drosophila muscarinic acetylcholine receptor (mAChR) was investigated using a polyclonal antiserum raised against a peptide corresponding to the predicted receptor carboxyl terminal domain. Immunocytochemical studies on fly sections indicated that the product of the Dm1 mAChR gene was localized in the antennal lobes and in other regions of the brain and thoracic nervous system. Intense staining in the glomeruli of the antennal lobes, the region of the nervous system containing terminals of antennal olfactory sensory neurones and mechanosensory neurones, indicates possible roles for this mAChR gene product in the processing of olfactory and mechanosensory signals in the fly. The staining of a discrete group of neurosecretory cells in the pars intercerebralis of the brain indicates a possible new role for this mAChR in the regulation of neurosecretion. Very little staining is detected in the thoracic nervous system.
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