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Expression of Bcl-2 in the rat hippocampal CA1 region (immunohistochemical staining, light microscopy, × 400).
(A) There were few Bcl-2 positive cells (brown) in the control group.
(B) There were a large number of Bcl-2 positive cells (brown) in the medium-intensity exercise group.
(C) There were some Bcl-2 positive cells (brown) in the high-intensity exercise group.
