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Representative photomicrographs of the CA3 region showing GABAAR α1, α2, α3, α5, β3, and γ2 subunit expression (red), and α1, α2, α3, α5, β3, and γ2 immunoreactivity overlaid with Hoechst (blue) labeling for representative young and old mice (A–X). Scale bar, 50 μm.
