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Changes in relative expression of the p21 mRNA and protein between TGF-β1 treatment and control (ctrl) groups. TGF-β1 treated MC and control groups are investigated by RT-QPCR (a) and western blot (b); β-actin was used as internal control gene. Results are expressed as fold over control (mean ± SEM; # P < 0.05 versus ctrl, n = 3).
