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Summary of Northern blot analyses showing the relative abundance of KDR/Flk mRNA in lung tissue from animals exposed to >95% FiO2 for 24 or 48 hours (24h and 48h, respectively) compared with mRNA from lung of control animals (C). Results were corrected for loading and normalized to control. After 48 hours of exposure to hyperoxia, KDR/Flk mRNA was reduced to 58% of control value. n = 6; *P < 0.05.
