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Confocal images of immunohistochemical labeling of Iba1 (green), CD11b (red), and TMEM119 (turquoise, antibody by Synaptic Systems) as indicated in brain cryosections obtained from a young (upper row) and old (lower row) mouse. In the merged image of the old mouse, white arrows point to cells that display almost only Iba1 IR, and white arrowheads to cells with Iba1 IR and CD11b IR and almost no TMEM119 IR. Scale bars: 50 μm.
