Fig 1: Tracer leakage in 2% FB 3-day protocol. A 60× image of (A) FB labeling, (B) NeuN labeling, and (C) FB, NeuN, and VAChT labeling. The white arrows indicate non-neuronal structures that are positive for FB+ (in (A)) but negative for both NeuN (in (B)) and VAChT (in (C)). The scale bar represents 20 µm. Image taken on Olympus FV1000 confocal.