Table 1. BrdUrd labeling and BrdUrd/TH colabeling in the SN.

Animals	Treatment	Total BrdUrd+ cells	BrdUrd+ / TH+ cells
Mice* (n = 2)	150 mg/ml BrdUrd	2,110 ± 320	22 ± 2
Mice (n = 6)	75 mg/ml BrdUrd	1,903 ± 267	0
Rats (n = 4)	75 mg/liter BrdUrd	3,025 ± 1,051	0

We implanted adult mice and rats (9–10 weeks old) with osmotic minipumps filled with BrdUrd (75 mg/ml delivering 0.25 μl/h for 21 days) into the right lateral ventricle. Values represent mean ± SEM.

^*Data are from Zhao et al. (16)