PARK7 and Parkinson disease: The DJ-1-β-sub PLA signal in VTA DA neurons showed no difference between brains of patients with PD and controls across all three subcellular regions (in VTA and NAc) (PD: somata M = 0.489 ± 0.027 R, n = 20; proximal neurites M = 0.628 ± 0.030 R, n = 20; NAc M = 0.592 ± 0.027 R, n = 17; control: somata M = 0.401 ± 0.019 R, n = 20; proximal neurites M = 0.588 ± 0.028 R, n = 20; NAc M = 0.620 ± 0.019 R, n = 19) (Fig. 3B).