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(A) Western blotting analysis of phosphorylated Smad1/5/8 in lungs from E18.5 WT (Fstl1+/+), Fstl1−/−, SFTPC-Fstl1 and compound mice. (B) Western blotting analysis of phosphorylated Smad1/5/8 in lung tissues from P60 SFTPC-Fstl1 transgenic mice and their WT littermates.
