Table 1. Experiment plan.

Experiment	Irradiation	Proteins	Sample size	Repetition
1	Carbon ions	γH2AX + 53BP1	10	2
2	Carbon ions	Rad51 + 53BP1	25 (Rad51) + 10 (53BP1)	2
3	Protons	Rad51 + 53BP1	10 (Rad51) + 10 (53BP1)	2
4	Protons	γH2AX + 53BP1	19 (γH2AX) + 20 (53BP1)	1