(B-C) Enzymatic activity measured in single brain slices of NHPs of study group 1 (B) and study group 2 (C) (filled grey bars, injected hemisphere; striped grey bars, contralateral hemisphere), and in UT and LV.GFP-injected NHPs (white bars; physiological levels). Arrows on x axis indicate the injection sites. n=2-12 tissue blocks/slice. Number of tissue blocks analyzed per animal: 51 (UT/LV.GFP), 98-122 (S1.1 and S2.2), 12-22 (S1.2, S1.3, S2.2, S2.3). Two-way ANOVA followed by Bonferroni's multiple comparison tests, *p<0.05; **p<0.01; ***p<0.001 vs matched slices of UT/LV.GFP. 