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Aged control whole mount choroid immunolabeled for (A) UEA lectin (blue), (B) tryptase (red), and (C) chymase (green). The vast majority of human choroidal MCs are of the MCT phenotype (tryptase+/chymase−). Only a small percentage of MCs are MCtc (tryptase+/chymase+) (arrows). Scale bar: 30 μm.
