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Tobacco smoke increased ERK5 activation in the stomach tissues of mice. (A) Western blotting analyses of phosphorylated ERK5 and total ERK5 in the stomach of mice exposed to tobacco smoke for 12 weeks; (B) Western blotting analyses of phosphorylated c-Fos in the stomach of mice. Data are expressed as mean ± SD. ** p < 0.01, compared with control. FA = filtered air; TS = tobacco smoke.
