RAD51 and hepatocellular carcinoma: Interestingly, however, Olaparib-induced RAD51 foci at γH2AX-marked DNA damage sites in MDA-MB-436 cells were in the range of RAD51 foci numbers in non-TNBC or MDA-MB-468 TNBC cells but close to the detection limit in HCC-1937 cells despite γH2AX foci numbers in the normal range (Figure 3b).