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DA turnover following 12 and 24 h exposure to vehicle alone, or 5 or 10μM of PCB153. Samples (from cell extract = int, medium = ext) underwent HPLC analysis for determination of DA the metabolites DOPAL, DOPAC and DOPET. Each value represents the μM/mg protein ±SEM of 3 to 5 experiments. *p<0.05 compared to the control.
