Figure 3

Relative mRNA expression of CD4 gene at 21dpi. Real-time quantitative PCR was used to detect the mRNA expression level of CD4 gene in different chicken lines with or without MDV infection at 21dpi. The relative expression level of CD4 gene was normalized to a house keeping gene GAPDH. Non.: noninfected control samples; Inf.: infected samples. n=4 for each line and treatment.