<p>AtT-20 cells were transfected with both subunits for the GABA<sub>B</sub> receptor along with GFP (shown in green). Immunohistochemistry was performed for the GABA<sub>B1</sub> subunit (red) and cell nuclei were stained with DAPI (blue). <b>a)</b> Magnified image of an isolated cell demonstrating GABA<sub>B1</sub> subunit protein at the cell membrane in a GFP positive cell. <b>b)</b> Negative control (no primary antibody for GABA<sub>B1</sub>). A merged image is shown at the bottom of each column. Scale bars are 5 μm.</p
