<p>A. Reporter constructs of <i>TAp73</i> promoter with a serious of deletions from the 5′ end. Putative binding sites for <i>E2F</i> and <i>p53</i> are depicted. The drawing is not proportional to the actual size. B. MCF-7 cells were co-transfected with luciferase reporter constructs with different lengths of <i>p73</i> promoter, pSV-β-Gal, and vectors of control siRNA or p53siRNA. Luciferase activity was measured 40 hours after transfection, which was followed by β-galactosidase normalization.</p
