Mean DAT protein levels (A) (with representative immunoblot) in control, BD and SZ frontal cortex. Data are ratios of optical densities of DAT protein to β-actin, expressed as percent of control. mRNA levels of DAT (B) in postmortem control, BD and SZ frontal cortex, measured using real time RT-PCR. Data are mRNA levels of DAT in the BD and SZ brains normalized to the endogenous control (β-globulin) and relative to control level (calibrator), using the ΔΔCT method. Mean ± SEM, *p < 0.05, **p < 0.01.