The images show confocal micrographs of the substantia nigra from animals that received intranigral infusions of LCMV (A-F) or MuLV (G-L) pseudotyped lentiviral vectors 21 days previously. Sections were labeled by indirect immunofluorescence in order to detect GFP (green; A, D, G, J) and S100β (red; B, E, H, K). Low magnification images (A-C, G-I; bar = 50 μm) illustrate the relative topographical distributions of transduced cells and astrocytes. High magnification images (D-F, J-L bar = 20 µm) demonstrate co-localization of GFP and S100β in the cell bodies of individual astrocytes (arrowheads).