TP53BP1 and cancer: However, since only 20–30% of γH2AX foci co‐localized with 53BP1, we believe that other types of DNA damage, such as inter‐ and intra‐strand cross‐links, may occur in CDDP‐treated cochlear cells, as previously reported in cancer cells (Ang et al, 2010; Woods & Turchi, 2013).