Figure 3From: Chromosomal instability and lack of cyclin E regulation in hCdc4 mutant human breast cancer cellsSUM149PT cells exhibit cell cycle arrest in the S phase. Propidium iodide staining shows that SUM149PT cells (b) have significantly fewer cells in the G1 phase than MCF10A cells (a). Almost 50% of cycling SUM149PT cells are in the S phase, and the sharp peak suggests that some cells are experiencing S-phase delay or arrest.Back to article page