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DHFR protein expression in MPTP-induced PD in gastric and colon tissues. a Representative immunoblot and densitometric analysis of DHFR in gastric antrum tissue, b representative immunoblot and densitometric analysis of DHFR in proximal colon, c representative immunoblot and densitometric analysis of DHFR in middle colon, and d representative immunoblot and densitometric analysis of DHFR in distal colon. *p < 0.05 compared with control (n = 4). C Control, PD Parkinson’s disease
