A. Laser-localized ICLs combined with immunofluorescence to study DDR activation by, and repair of, laser localized ICLs. γ-H2AX and the FAN1 nuclease appear in ICL stripes. Monitoring the Dig tag reveals repair of the ICL and the greater persistence of γ-H2AX.
B. Laser-localized ICL induction and proximity ligation assay (PLA) to distinguish DDR proteins that are proximal or distal to the tagged ICL.