Glp-1r mRNA expressed within the GC. A, Localization of the GC (shaded gray) in a coronal section of the mouse brain. B, Representative image of Glp1r mRNA and DAPI in GC layer II/III. C, View of yellow-indicated region in B with (top) and without (bottom) DAPI to aid in visualization of Glp1r expression. D, View of Glp1r mRNA in the GC and in the NAc from the same coronal section. E, Quantification of Glp1r mRNA for each region; n = 5 mice, 2–12 sections per mouse.