Comparison of Chd8, Chd7 and Chd2 expression patterns in the P20 mouse brain. Sagittal sections through P20 mouse brain (anterior to the right), hybridised with antisense RNA probes to detect Chd8 (A,A’), Chd7 (B,B’) and Chd2 (C,C’) transcripts, visualised in blue. Representative lateral (top) and medial (bottom) sections are shown for each. Note high expression of all three genes in the cerebellum, with widespread Chd8 and Chd2 expression remaining in the neocortex. High‐magnification images of the cerebellum (Aa–Ca), hippocampus (Ab–Cb) and neocortex (Ac–Cc) are shown. Scale bars: 100 μm. CA1–3, cornu ammonis 1–3; Cb, cerebellum; DG, dentate gyrus; GCL, granule cell layer; HC, hippocampus; I, cortical layer I; II–III, cortical layers II–III; ML, molecular layer; NC, neocortex; OB, olfactory bulb; RMS, rostral migratory stream; SGZ, subgranular zone; WM, white matter.