Western blotting was performed on whole-cell extracts by lysing cells in buffer as previously described11 (link). The antibodies against FOXM1 (C-20)(Cat#sc-502), β-tubulin (H-235) (Cat# sc-9104) and Cyclin B1 (Cat# sc-752) were purchased from Santa Cruz Biotechnology (Santa Cruz, CA, USA). The KIF20A antibody (ab104118) was purchased from Abcam (Cambridge, UK). The PARP (#9542) and Caspase7 (#9491) antibodies were purchased from Cell Signaling Technology (New England Biolabs Ltd. Hitchin, UK). Primary antibodies were detected using horseradish peroxidase-linked anti-mouse or anti-rabbit conjugates as appropriate (Dako, Glostrup, Denmark) and visualized using the ECL detection system (Amersham Biosciences, Pollards Wood, UK).