EYFP-mouse Ku70 accumulated with Ku80 immediately at DSBs induced by laser
microirradiation. (A) Time-dependent EYFP-Ku70 accumulation in living cells (5–60 sec)
after irradiation. (B, C) Immunostaining of microirradiated EYFP-mouse
Ku70-transfected cells with the anti-γH2AX antibody (B) or anti-Ku80 antibody (C). At
5 min postirradiation, the cells were fixed and immunostained with each specific
antibody. Left panels, EYFP-mouse Ku70 images (B, C); center panels, γH2AX (B) and
Ku80 images (C); right panels, merged images (B, C). Arrowheads indicate the
microirradiated sites.