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Expression of the NRSE-mutated nAChR β2-subunit gene promoter is restricted to neurons. The β-gal activity (arrowheads) and the glial fibrillary acidic protein immunoreactivity (arrows) were compared in different regions of the adult brain. (a) Layer 2 of the pyriform cortex. (b) Pyramidal neurons of the hippocampus. (c) Oligodendrocytes (arrows) of the optic tract (Opt) and neurons (arrowheads) of the Supra-optic nucleus (SO).
