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Anomalous lung lobation in KO young adult as compared to WT. (A) Caudal lobe from KO lung with incomplete separation between the middle and the caudal lobe of the right lung. (B) Caudal lobe from WT. (C) KO caudal lobe from KO with incomplete or missing fissure (C) which is present in WT lungs (D, an aluminum foil demonstrates where the fissure is running). Dashed line represents area of incomplete separation (A); dotted line indicates fissure in WT (B). Scale bar is 2 mm.
