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Effects of MPTP (20 mg/kg, s.c) on dopamine concentration in mouse brain section. The endogenous level of dopamine in mice brain scetions ((A) striatum, (B) substantia nigra, (C) hippocampus) were measured by LC-MS/MS in three different mice species. (D) internal calibration for dopamine. Data is expressed as mean±s.e.m. *p<0.05, **p<0.01 (n=5).
