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Two different populations of γH2AX foci. Immunofluorescence analysis of γH2AX and 53BP1 in HF cells irradiated with 0.2 Gy. Two populations of γH2AX foci, distinguished by the size and colocalization with DNA DSB repair proteins, are shown. The small foci are more numerous and do not colocalize with 53BP1, while the large foci represent a small population and colocalize with 53BP1.
