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Cinnamic acid (CA) does not induce mRNA expression of clock genes. Expression levels of Per1 (A), Per2 (B), Bmal1 (C) and Rev-erba (D) mRNAs assessed by semi-quantitative RT-PCR after stimulation with CA (filled circles) or vehicle (unfilled circles). Values at time 0 are expressed as 100% in each graph. All values are expressed as means±SEM (n=3 – 4 per group).
