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Effects of MPTP (20 mg/kg, s.c) on the expression of tyrosine hydroxylase in the striatum in the three strains of mice. (A) Representative immunoblots of tyrosine hydroxylase (TH) and β-actin expression. (B) Densitometry plot of TH expression immunoblots normalized to the control levels, with and without MPTP treatment (n=4). *p<0.05 and **p<0.01 vs. black bar (control group).
