YAP mRNA levels in HT3 cells treated with or without E6 (400 nM) for 48 h in McCoy's 5A with 1% serum. mRNA levels were measured with real-time PCR. Data were normalized with 18S mRNA. Each bar represents mean ± SEM (n = 5). Bars with same letters are not significantly different from each other (P > 0.05) (P = 0.3233). 