Figure 2. Cell division cycle 42 homolog (S.cerevisiae; CDC42) accumulates in terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL)-negative photoreceptors after light exposure. Retinal sections of light exposed wild type mice were co-immunostained for CDC42 and TUNEL. Time points after light exposure are indicated and arrowheads highlight CDC42 positive cells. Red: CDC42. Green: TUNEL. Blue: nuclei (4’,6 diamidino-2-phenylindole [DAPI] staining) Scale bar: 20 μm. ONL: outer nuclear layer.