E-cadherin representative Western Blot and summary densitometry. Compared with alveolar stage human lung, E-cadherin protein levels were increased significantly in CCAM and showed a trend towards increased levels in BPS. Levels of E-cadherin in CCAM and BPS were more similar to canalicular stage lung tissue. *P = 0.04, CCAM vs. Alv, means ± SE, n = 6, Can; n = 3, Alv; n = 4, BPS; n = 7, CCAM.