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Morphological characteristics of epidermal cells in the 4 groups. A: Non transfection (G-non) group; B: Empty vector transfection (G-empty) group; C: CCND1 transfection (G-CCND1) group; D: Positive control (G-positive) group. Scale bar = 50 μm. CCND1, cyclin D1; G, group.
