Light micrographs of coronal forebrain sections are shown, 21 days after intranigral infusion of lentiviral vectors pseudotyped with envelope proteins derived from VSV (A, E), MV (B, F), LCMV (C, G), or MuLV (D, H). Low magnification images (A-D; bar = 500 μm) are shown for each pseudotype, in order to illustrate restricted expression of the GFP transgene within the striatum. High magnification images (E-H; bar = 50 μm) of the striatum illustrate the striking differences in striatal GFP expression between the different pseudotypes.