Figure 2

Sox9 deleted cells are lost over time. Immunostaining of control (MMTV-Cre; Sox9^wt/wt) and Sox9 cKO (MMTV-Cre; Sox9^fl/fl) mouse mammary glands cut sections (3, 5, 8 weeks old mice) with Cre antibody (red). Green and blue represent anti-SMA and DAPI staining, respectively.