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Immunohistochemical analysis of TNF expression in eyes of Mertknmf12 mutants. TNF is faintly present in the outer retina in peripheral (A) and central (C) retinas of C57BL/6J mice (white arrows). In comparison, TNF fluorescence is much more intense in the outer retina in the peripheral (B) and central (D) regions of Mertknmf12 homozygous retinas (white arrows). Scale bar, 50 μm (A–D).
