Figure 2 Effect of palm pollen treatment on serum ALT and AST in DEN-induced hepatocellular carcinoma. Data are expressed as means±SEM (n=10). A P value less than 0.05 is considered significant. Groups having the same letter are not significantly different from each other, while those having different letters are significantly different. ALT, alanine aminotransferase; AST, aspartate aminotransferase; DEN, diethyl nitrosamine.