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Inhibitory effects of Tyr on COX-2 (A) and iNOS (B) expression in LPS-stimulated RAW264.7 cells. Cells were incubated with the indicated concentrations of Tyr for 24 hr and subsequently with LPS for 24 hr. COX-2 and iNOS protein expression was detected by western blot analysis. Data represent the mean ± S.D. (n=3). *P<0.05, **P<0.01 significantly different from LPS group.
