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Expression of GCaMP6s in L2/3 and L5 after P1 injection. (A) Coronal view of a section through the brain of a P16 mouse that was injected with rAAV-Syn_GCaMP6s at P1. Note the spread of the expression across the hemisphere and the abundant expression in L2/3 and L5, but not L4. Scale bar = 500 μm. (B) Higher magnification image of GCaMP6s expression in L2/3 and L5. Scale bar = 100 μm.
