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Norepinephrine represses Rarg and Rdh12 gene expression. qPCR analysis of cultured rat pineal glands following 4-h treatment with vehicle control or norepinephrine (NE). Values represent the fold change in mean mRNA expression compared to control, ± SEM. N ≥ 3 glands per treatment. *P < 0.05; **P < 0.01
