FGFR1 and FGFR2 are coexpressed in neural precursors of the DG. A, Immunofluorescent staining of the DG showing colocalization of SOX2+ cells with fluorescently labeled reporters for Fgfr1 and Fgfr2 expression. B, Enlargement of boxed area in A; arrows point to SOX2+ cells colabeled for FGFR1-GFP and FGFR2-mCherry. C, Quantification of SOX2+ cells colocalizing only with FGFR1 (green; 3.5%), only with FGFR2 (red; 0.6%), or both (orange; 95.9%). n = 5 mice.