Commercially available antibodies obtained from Cell Signaling against the indicated proteins were: Cdc2/CDK1 (Cat # 9112S), CDK1-P-Y15 (Cat # 4539S), Histone H3-P-S28 (Cat # 9713S), p53-P-S15 (Cat # 9284), SMC1-P-957 (Cat # 4805S), SMC1 (Cat # 4802S), CDC25A (Cat # 3652S) and Chk2-P-T68 (Cat # 2661S). Antibodies obtained from Santa Cruz Biotechnology were CDC25A F-6 (Cat # sc -7389), CDC25C H-150 (Cat # sc-5620), Cdc2 (Cat # sc-54). Others were against actin (Cat. 109 # MA515739, Pierce), RPA32-P-S4/8 (Cat # A300-245A, Bethyl), cyclin A (Cat # 06-138, Upstate) γH2AX (Cat # 05-636, Millipore), Chk2 Clone 7 (Cat # 05-649, Millipore), cyclin B1 (Cat. # 05-373, Millipore), and CDK1 (Cat. #Ab18, Abcam). Secondary antibodies have previously been described. Additional antibodies used for immunofluorescence include: cyclin B1 (Cat # 4138S, Cell signaling), Alexa 488 (anti-mouse Cat # A11029, anti-rabbit Cat # A11034, Invitrogen) and Alexa 568 (anti-mouse Cat # A11031, anti-rabbit Cat # A11036, Invitrogen). NS1 CE10 and NS1 91W were described previously [7] (link).
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