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Heterogeneity of the NIH3T3 cell line (obtained from DSMZ). Cells were stained for actin with Phalloidin-TRITC (a) (red) and α-smooth muscle actin (b) (green), showing distinct expression of α-smooth muscle actin. Nuclear stain with DAPI (c) (blue) and merged images (d). Bars: 20 µm.
