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Expression of DNA methyltrasferase genes after MDV infection. The expression of three DNA methyltrasferase genes, DNMT1 (A), DNMT3a (B), and DNMT3b (C), were tested by quantitative real-time RT-PCR at 5, 10, and 21 dpi in chicken spleen both resistant and susceptible to MD. The relative expression level was normalized to GAPDH gene. Black: non-infected; white: infected. *P < 0.05, **P < 0.01. N = 4 for each group. Error bar = SEM.
