Figure 4.

Lack of effect of SOD and catalase on inhibition of [³H]-DA uptake by DO donors. DEA/NO, PAPA/NO, or SIN-1 were present at 0.8 mM. Data represent specific uptake and are expressed as percentage of amount of [³H]-DA in vehicle-treated control wells (on average 14,600 c.p.m.). Results are mean±s.e.mean (vertical bar) of three independent experiments, each performed in triplicate. There were no statistically significant differences between NO donors by themselves or in combination with SOD plus catalase (two-way ANOVA followed by Duncan Multiple Comparison test).