Photomicrographs of TH+ cells in the SNc of Balb/c (A,C,E,G) and C57BL/6 (B,D,F,H) in each of the Saline (A,B), Saline-NIr (C,D), MPTP (E,F) and MPTP-NIr (G,H) groups. Similar patterns of immunostaining were seen in both strains. There were fewer TH+ somata in the MPTP group (E,F) compared to other groups. All figures are of coronal sections; dorsal to top and lateral to right. The region depicted shows the lateral region of the SNc, corresponding approximately to plate 57 in the mouse atlas . Scale bar = 100 μm.