Representative confocal micrographs of bassoon (A1, B1: green), vGAT (A2, B2: red) and bassoon plus vGAT immunoreactivity (A3, B3: yellow) in the STN of a control (A) and 6-OHDA-depleted (B) animal. The densities of immunoreactive structures in the STN were not altered by chronic dopamine depletion compared to control in the representative micrographs nor across the sample population (C). The scale bar in A1 applies to each micrograph. *, p < 0.05.