Fig. 3.

Antibody microarray analysis validates phosphoproteins involved in the early response to γ-radiation. (A and B) Normal human fibroblast cells were incubated for 0.5 h after exposure to 0.05 or 2 Gy of γ-radiation. Expression of levels of phospho-NBS1 (Ser343), NBS1, phospho-Gab2 (Tyr643), Gab2, phospho-BTK (Tyr550), BTK, phospho-ETK (Tyr40), ETK, phospho-Elk1 (Ser383), Elk1, phospho-CamK4 (Thr196/200) and CamK4 were determined by western blotting. (A, MRC-5 cells; B, NHDF cells). β-actin was used as a loading control. The asterisk (*) indicates nonspecific band.