Figure 10

The majority of TrkB-positive cells in St. 29 sympathetic ganglia do not proliferate under basal conditions in vivo. St. 27 embryos were injected with 25 μg BrdU and embryos were harvested at St. 29. Transverse sections of sympathetic ganglia prepared to determine whether TrkB-positive cells (red) in sympathetic ganglia positively-labeled for BrdU. The majority of TrkB-positive cells do not proliferate under basal conditions in vivo. Arrows indicate proliferating cells. Calibration bars = 20 μ.