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(A) Cell cycle was detected by flow cytometry analysis. (B) The S-phase cell ratio and proliferation index were calculated at the same time based on the following equation: S-phase cell ratio=S/(G0/G1 + S + G2/M); proliferation index=(S + G2/M)/(G0/G1 + S + G2/M). Data are presented as the mean ± standard deviation. *P<0.05; ***P<0.001 vs. pEGFP-N1; ∆∆P<0.01 vs. control group.
