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Protein expression levels of retinoic acid receptors (RARs) in normal lung explants (DMSO) treated with retinoic acid (RA)
A, RARα. B, RARβ. C, RARγ. Representative blots are shown. Protein levels were normalised to β-tubulin, which was used as a loading control. The data are presented as means ± SEM. **P < 0.01 vs. DMSO.
