English: Figure 1. Retroviral labeling of newborn neurons in the DG. (A) Photomicrograph shows retrovirally labeled newborn dentate GCs (pCAGGFP, Zhao et al., 2006) expressing green fluorescent protein (GFP) throughout the entire cell, at 42 days post-retroviral injection (dpi). (B) Low power overview of new neurons shown in panel (A), expressing cytoplasmic GFP in the DG at 42 dpi. Nuclei are labeled with 4′-6-diaminodino-2-phenylindole (DAPI), blue. Scale bar, 25 μm.