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Aβ 1-40 in drusen. Immunohistochemistry for Aβ 1-40 was developed in AEC (red) and counterstained with Mayer’s hematoxylin (blue). (A) Aβ 1-40 in drusen of a 72-year-old non-GA female postmortem donor eye. (B) Negative control using nonimmune rabbit IgG isotype antibody on the same donor eye section. RPE, retinal pigment epithelium; D, drusen; BM, Bruch’s membrane; Ch, choroid. Scale bar: 10 μm.
