Apoptosis and cell proliferation in <i>Smad4^CKO</i> ureters.

<p>(A, B) Apoptosis was assessed by TUNEL. Arrows indicate TUNEL positive cells. (C, D) Cell proliferation was analyzed by EdU labeling. Arrows indicate proliferating cells. (E) Statistical analysis of TUNEL positive cells. (F) EdU positive cells were quantified. (G) Relative <i>Mycn</i> mRNA expression was measured by qRT-PCR.