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TLR4 expression in macrophages of the basilar membrane. (A) TLR4 is expressed in cells of the basilar membrane. Arrows indicate TLR4-positive cells. (B) Double labeling of the macrophage marker protein F4/80 in the same tissue. (C) Merged images of panels (A,B). The TLR4-positive cells are also F4/80 positive. Scale bar = 20 μm [citing from Vethanayagam et al. (2016)].
