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Aperio imaging of tracheal (A and B) and lung (C and D) tissue from K14-rtTA−/−/TRE-Cre+/0/RS+/0/WT/DE3 mice. RS is the ROSA26-floxed recombination substrate transgene. Activity of the β-galactosidase (β-gal) reporter is represented in blue. The frequency of the pattern in A and B is specified in the lower right corner.
