Fig. 2

Age-related constitutive and phenobarbital-inducible expression of CYP2B1/2 mRNA in rat small intestine. Values are expressed as mean integrated optical density (IOD) ± S.D Significant difference at ***P < 0.001 and **P < 0.01 and *P < 0.05 versus control immature 2-week-old rats, at ^‡ P < 0.01 and ^† P < 0.05 versus control 2-month-old rats, at filled circle P < 0.05 versus induced 2-week-old rats, at ^# P < 0.05 versus induced 2-month-old animals, at filled square P < 0.01 versus induced 4-month-old rats, at filled diamond P < 0.05 versus induced 20-month-old individuals