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(A) There was no detectable expression of Bcl-XL in room-air-exposed mice (A). In both room-air-exposed mice and hyperoxia-exposed mice, probucol treatment increased Bcl-XL expression in lung epithelial cells (B, D). In hyperoxia-exposed mice without probucol treatment, there was a low-level expression of Bcl-XL (C). Original magnifications: ×200.
