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. 2018 May 31;16(2):1981–1990. doi: 10.3892/ol.2018.8851

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Figure 3. — NaB induces the mRNA expression of Per1 and Per2 in human NCI-N87 gastric cancer cells. NCI-N87 cells were treated with the indicated concentrations of NaB for (A and C) 48 or (B and D) 96 h, then Per1 and Per2 mRNA expression was determined by reverse transcription-quantitative polymerase chain reaction. Data are reported as mean ± standard deviation of three independent experiments, each performed in triplicate. **P<0.01, as indicated. NaB, sodium butyrate; Per, period circadian regulator.