Fig. 2.

nAChR β4 subunit promoter activity in ED18.5 transgenic mice. Sagittal sections of WT transgenic (A - D) and mutant CA box transgenic (E - H) ED18.5 mouse embryos are shown. These sections were simultaneously stained for β-Gal activity and then counter-stained with neutral red. (A and E) lower lumbar region of the spinal cord; (B and F), intestine; (C and G) cortex; (D and H) lower lumbar dorsal root ganglion (DRG). Arrows in panels A, C and D indicate β-gal-expressing cells.