VOLUME 283 (2008) PAGES 31012–31020
This article has been withdrawn by the authors. The same data were used to represent different experimental conditions. Specifically, lane 6 from the E2F3 panel in Fig. 1A was reused in lane 8 of the same panel. Lane 1 from the E2F3 panel from Fig. 4A was reused as lane 3 of the same panel. The authors state that the image reuse does not affect the overall conclusions of the study.