Files in this Data Supplement:

• Supplemental file 1 - Fig. S1 (Specificity of phospho-specific antibodies) and S2 (Role of phospho residues in relation to Chk2 activation)
  Zipped PDF document, 721K.
• Supplemental file 2 - Fig. S3 (Absence of γ-H2AX focus formation in response to 4-NQO and HU treatments) and S4 (Correct localization and pT68 focus formation of silencing escaping Chk2)
  Zipped PowerPoint and MS Word documents, 7MB.