Bad-Bcl-xl interaction in CS exposed rat lungs. (A) A representative immunoblot picture of immunoprecipitated Bcl-xl probed for Bad after 3 days, 8 weeks and 6 months of CS exposed rat lungs. Bad interaction with Bcl-xl was significantly increased at 3 days, 8 weeks and 6 months CS exposure compared to sham-exposed animals (n = 6). (B) Histograms represent the Mean ± SE of percentage of Bad interaction with Bcl-xl. ** p < 0.01 compared to sham-exposed animals.