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Effect of hyperoxia and TG EC-SOD on DNA nicking [TdT-mediated dUTP nick end labeling (TUNEL)] at P3. Top: representative photomicrographs (×200 magnification) for each condition. Bottom: mean TUNEL intensity in pixels normalized to nuclear area (4′,6-diamidino-2-phenylindole perimeter), 5 pups/group + SE. *P < 0.05 vs. air WT, **P < 0.05 vs. O2 WT.
