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Arginase-1 positive cells in the injured peripheral nerve tissue are macrophages. Double immunofluorescently stained peripheral nerve sections at day 0, day 1, day 3, and day 14 upon axotomy showing arginase-1 colocalizing with F4/80, a general macrophage marker. F4/80, red; S100, red; arginase-1, green. Scale bar 20 μm.
