Figure 3

Viral matrix (M) gene expression in copy number normalized with β-actin gene expression (10 ⁵ copies) during infection of human primary type I-like alveolar epithelial cell. M gene expression in type I-like alveolar epithelial cells infected (MOI = 2) with influenza (A) A/HK/54/98 (H1N1) and (B) A/HK/483/97 (H5N1) virus. Black circles indicate gene expression after apical infection and open square indicates gene expression after basolateral infection. Asterisk indicates a greater M gene expression in apical infected cells than basolateral infected cells with statistical significance of p < 0.05.