Overlapping expression of SOX2 and miR-21. IHC and in situ hybridization showing the expression pattern of SOX2 and miR-21, respectively. miR-21 expression in Gtv a wild type mouse brain at different developmental stages E18 is shown in A), P1 in B) and P7 in C). Scale bar is indicated in the figure and represents 50 μm. Arrow indicates overlapping expression of SOX2 and miR-21. Abbreviations: dorsal lateral geniculate nucleus (dLG), ventral lateral geniculate nucleus (vLG), dentate gyrus (DG).