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Only a Small Percentage of High- and Low-Phagocytic RPE Cells Express the Mesenchymal Marker Protein α-Smooth Muscle Actin
Representative x-y maximal projections of high-phagocytic RPE line #1 (A and C) and low-phagocytic RPE line #5 (B and D) show staining of smooth muscle actin (αSMA, green) alone (A and B) or merged with F-actin (red) (C and D). Similar results were obtained for all eight RPE lines (see Results). Scale bar, 10 μm.
