Loss of dopaminamergic nerve terminal markers in the striatum of MPTP treated monkeys. (A) Immunohistochemical staining reveals strong staining of striatal sections of control brains (left panel: top and middle) for tyrosine hydroxylase and dopamine transporter; whereas, MPTP administered monkey striatal sections (right panel: top and middle) show a minimal staining. The bottom panels are sections stained with luxol fast blue. The images are unmagnified scans of the slides. (B) Immunohistochemical staining reveals strong staining of striatal sections a control brains (left) for TyH and DAT; whereas, in an MPTP administered monkey, striatal sections (right) show minimal staining, Bar = 20 μm. The images are representative of the monkeys in each group.