Figure 5 DRG Neurons Expressing EWS-Pea3 Isochronically Depend on Neurotrophins for Survival E14.5 lumbar DRG from TaumGFP/+ PVCre/+ (A and B) and TauEWS-Pea3/+ PVCre/+ (C and D) embryos cultured for 48 h without neurotrophic support (A and C) or in the presence of NT-3 (B and D) were stained for expression of neurofilament (red) and LacZ (green) to visualize axonal extensions and survival of PV-expressing proprioceptive afferents. Scale bar: 150 μm.