All siRNA duplexes used in this study were purchased from Invitrogen or Sigma. Transfection and co-transfection was carried out using Lipofectamine RNAiMAX (Invitrogen) according to the manufacturer's instructions. Cells were harvested 72 h after transfection. The individual siRNA duplexes used were: siFANCD2 (5′CAGAGUUUGCUUCACUCUCUATT-3′) (Invitrogen) (4 (link)) siFANCA (5′AAGGGUCAAGAGGGAAAAAUA-3′) (Invitrogen) (5 (link)); Luciferase Control (Ctrl) (5′UCGAAGUAUUCCGCGUACGTT-3′) (Invitrogen) (8 (link)).